When 2 heterozygous parents (Rr) are crossed, what are the alleles of the
offspring?
a. 100% Rr
b. 50% RR, 50% Rr
c. 25% RR, 50% Rr, 25% rr
Answers
When two heterozygous parents (Rr) are crossed due to dominance effect offspring will be 25% RR, 50% Rr, 25% rr, hence c is correct option.
What is heterozygous parents?Heterozygous condition when parent having both the allele showing different trait of one character and one allele masks the trait of another allele.
When cross of heterozygous parents (Rr) x (Rr).
Gametes are R,r and R,r.
Genotype will be 25% RR, 50% Rr, and 25% rr.
Due to law of dominance, one allele R is dominant over the other allele during crossing over.
Cross of parents in punnet square is attched in image below.
Therefore, both the parents are heterozygous, so offsprings will be having genotype, 25% RR, 50% Rr, 25% rr, hence option c is correct.
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Related Questions
Just a reminder to take a break! Your brain is hurting and you need some water! Use this app to understand not to cheat too!
Answers
Answer:
THX
Explanation:
Your mind needs to rest
A researcher attempts to use a segment of ribosomal RNA as a molecular clock to calculate the date of the last common ancestor of two species. He finds that the two species diverged from a common ancestor 150 million years ago. These particular species have abundant fossil records that strongly suggest that these species diverged 100 million years ago. Which of the following answer choices best describes a reason for the discrepancy in the date of the last common ancestor of these species?
A. Ribosomal RNA is not a reliable molecular clock and should not be used for dating.
B. The neutral mutation rate used in calculating the last common ancestor date may not have been accurate.
C. It is highly likely that the two organisms did not share a common ancestor, so the results are invalid.
D. A large portion of the ribosomal RNA is not vital to survival, so it is not likely to be well preserved.
Answers
Answer:
B
Explanation:
It is B because the mutation rate should not have been accurate if it showes that they diverged 150 million years ago. But the abundant fossil records show that it diverged 100 million years ago.
Hope this helps:)
Ribosomal RNA is not a reliable molecular clock and should not be used for dating.
What is molecular docking?In structural molecular biology and computer-assisted drug design, molecular docking is an important technique. The purpose of ligand-protein docking is to anticipate a ligand's most common binding mode with a protein having a known three-dimensional structure.What is dating? Carbon dating is used to determine the age of ancient material such as an archaeological or paleontological specimen .A molecular clock estimates how long it has been since similar species separated from a common ancestor based on DNA sequences (or the amino acid sequence of proteins encoded by DNA).
Hence, the correct option is A.
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Why do the cells inside of your stomach get replaced every few days , but other cells in your body can live for weeks, months or even years?
Answers
Answer:
hi, this is the answer of your question
the cells that line your stomach can renew as fast as every two days, because they in contact with digestive acid.
The mechanism through which a parents gene is turned off, through the attachment of a methyl group to that parent's DNA is called :
A) methylation
B) mutation analysis.
C) cross contamination.
D) spermatogenesis or oogenesis.
Answers
Answer:
the answer is a methylation
Explanation:
which statement would most likely be used to describe variation
Answers
Answer:
"Variations that decrease reproductive success are more likely to be passed on" is the one statement among the choices given in the question that would least likely be used to describe variation. The correct option among all the options that are given in the question is the second option or option "B".
Explanation:
Answer:
Variations that decrease reproductive success are more likely to be passed on" is the one statement among the choices given in the question that would least likely be used to describe variation
HELP ASAP i need this to pass my grade
this is for science, and if i get the questions right, I pass, but the teacher never taught us the lesson, idrk y. so i really need help:( Im giving away 11 points so please give me your best answers ;)
1. As an astronaut travels from the surface of Earth to a position that is four times as far away from the center of Earth, based on the Law of Gravity which of the following statement is true?
a. mass remains the same and the gravitational pull from Earth decreases
b. weight remains the same and the gravitational pull from Earth changes
c. weight increases and the gravitational pull from Earth stays the same
d. mass decreases and the gravitational pull from Earth increases
2. A satellite is sent into orbit around the Earth, In which of the following situation would the gravitational force be the greatest?
A. 1200 lb satellite orbiting 150 miles above Earth’s surface
b. 850 lb satellite orbiting 150 miles above Earth’s surface
c. 850 lb satellite orbiting 1500 miles above Earth’s surface
d. 1200 lb satellite orbiting 1500 miles above Earth’s surface
3. High and low tides are the regular pattern of rising and sinking ocean-water levels. They are caused when the sun’s gravity and the moon’s gravity pull on ocean water. The moon’s gravity has a greater effect on Earth’s oceans than the sun’s gravity. Why would the moon have a greater effect than the sun?
a. The moon has less mass than the sun.
b. The moon is closer to Earth than the sun.
c. The moon is not as hot as the sun.
d. The moon has less mass than Earth.
4. Which statement about the universality of gravity is false?
a. The gravitational force between two objects depends only on their masses.
b. Any two objects that have mass also have a force of gravity acting between them, no matter how far apart they are.
c. The gravitational force between two objects increases if the objects move closer together.
d. The gravitational force between two objects increases if mass is added to one object.
Answers
1a
2a
3b
4a
Let me know if you want explanations :)
Why is it essential that threatened
species compete for resources successfully
Answers
If I helped please mark me brainliest
Answer:
Organisims compete to survive, like food, shelter, water amd more that is why it essential that threatened species compete for resources successfully
Given the following phylogenetic tree, which evolutionary event occurred most recently?
A.) development of different forms of symmetry.
B.) development of tissues.
C.) each of these traits evolved at the same time.
D.) protostome and deuterostome development.
Answers
Answer:
Option-D
Explanation:
A phylogenetic tree is a diagrammatic representation which is constructed in to show the common ancestors at the base of the tree and the branches represent the new species.
The phylogenetic tree which is constructed based on the traits evolved during evolution is known as a cladogram. In the given question, the cladogram represents the evolution of various groups of the organism from a common ancestor based on the traits evolved.
The trait which was evolved earlier is present at the base like the development of tissues while the most common trait is present at the top which is the development of deuterostome and protostome.
Thus, Option-D is the correct answer.
What odd thing happens at Mercury’s perihelion to the sun ?
Answers
Contaminated water called leachate from _____ can pollute groundwater.
Group of answer choices
A.solid waste incinerators
B.bioplastics
C.compost bins
D.sanitary landfills
E.recycling centers
Answers
Answer:
option D
Explanation:
Infusion is formed by the leaching of water in waste in a landfill along with the transfer of certain contaminates. Contaminated water called infusion from sanitary landfills can pollute groundwater.
What is sanitary landfill?Sanitary landfill is a landfill where waste is decomposed into biologically and chemically inert materials in a setting which is isolated from the environment.
There are the following types of landfills:
Municipal solid waste landfills.Industrial waste landfills.Hazardous landfills.Contaminated water called infusion from sanitary landfills can pollute groundwater.
Thus, the correct option is D.
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1. Chargaff’s rule states that the amount of _______ in DNA is always roughly equal to the amount of thymine, and that the amount of guanine in DNA is always roughly equal to the amount of cytosine.
2. The outside of the DNA double helix is made of alternating groups of deoxyribose sugars and _______.
3. The DNA double helix is _______, meaning that the two strands run in opposite directions.
4. What's x-ray crystallography?
5. Explain how Rosalind Franklin's x-ray crystallography work helped Watson and Crick in their quest to determine the physical structure of DNA.
6. What did Watson, Crick, and Franklin discover about the structure of DNA?
7. How did Watson, Crick, and Franklin's work reiterate Chargaff's findings?
Answers
1. adenine
2. phosphates
3. antiparallel
4. X-ray crystallography is a technique used to learn more about the three-dimensional structure of biological molecules. In x-ray crystallography, a molecule (for example, DNA) is crystallized. Then, x-ray beams are directed onto the molecular crystal. The pattern of diffraction, or bending, of the x-rays provides information about the physical properties of the molecule. Rosalind Franklin used x-ray crystallography to investigate the three-dimensional structure of DNA.
5. Watson and Crick were interested in learning more about the physical structure of DNA. They had come up with several hypotheses about how DNA could be structured, but they needed more concrete evidence of the molecule's structure. Rosalind Franklin's Photo 51 provided important information to Watson and Crick as they worked on a model of the three-dimensional structure of DNA.
6. Photo 51 confirmed that DNA is a double helix. Watson and Crick's model of DNA included that it is antiparallel, and that each base pair is held together by hydrogen bonds. The DNA chain is comprised of an outer backbone alternating between the sugar deoxyribose and phosphate groups. The base pairs, which are held together by hydrogen bonds, are located on the inner portion of the double helix.
7. Chargaff found that the number of adenine nucleotides was always roughly the same as the number of thymines, and the number of cytosines was about the same as the number of guanines. This provided the insight that in the DNA double helix, A selectively bonds with T, while G bonds with C. This explains why Chargaff consistently found that the number of As and Ts, and the number of Cs and Gs, were the same in his studies.
Answer:
adenine
phosphates
antiparallel
X-ray crystallography is a technique used to learn more about the three-dimensional structure of biological molecules. In x-ray crystallography, a molecule (for example, DNA) is crystallized. Then, x-ray beams are directed onto the molecular crystal. The pattern of diffraction, or bending, of the x-rays provides information about the physical properties of the molecule. Rosalind Franklin used x-ray crystallography to investigate the three-dimensional structure of DNA.
Watson and Crick were interested in learning more about the physical structure of DNA. They had come up with several hypotheses about how DNA could be structured, but they needed more concrete evidence of the molecule's structure. Rosalind Franklin's Photo 51 provided important information to Watson and Crick as they worked on a model of the three-dimensional structure of DNA.
Photo 51 confirmed that DNA is a double helix. Watson and Crick's model of DNA included that it is antiparallel, and that each base pair is held together by hydrogen bonds. The DNA chain is comprised of an outer backbone alternating between the sugar deoxyribose and phosphate groups. The base pairs, which are held together by hydrogen bonds, are located on the inner portion of the double helix.
Chargaff found that the number of adenine nucleotides was always roughly the same as the number of thymines, and the number of cytosines was about the same as the number of guanines. This provided the insight that in the DNA double helix, A selectively bonds with T, while G bonds with C. This explains why Chargaff consistently found that the number of As and Ts, and the number of Cs and Gs, were the same in his studies.
Explanation:
this is the answer Pennfoster gave me
Sam doesn't feel like he's being treated fairly by his parents. He wants to stay out
later, but they want his curfew set at 10PM. What is causing this conflict?
dispute over resources
differing values
Opower struggle
Omiscommunication
Answers
Answer:
c. power struggle
hope this helps
Natural selection is affected by which three factors? A. reproduction B. evolution C. variation D. overproduction E. mechanism F. competition
Answers
Natural selection is affected by evolution as three factor. The correct options are A, B and C.
Thus, Natural selection results in the transmission of advantageous genetic variants through reproduction.
As a result, a new generation of organisms emerges that has a higher chance of surviving and reproducing.
For instance, giraffes have an edge over other species due to their long necks, which have allowed them to graze on leaves that others cannot reach.
Because they had access to greater food, those with longer necks were able to breed and pass on the trait to the next generation. Less likely to survive and pass on their genes would be those with shorter necks and access to less food.
Thus, Natural selection is affected by evolution as three factor.The correct options are A, B and C.
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match each term to its definition
Answers
Answer:
Solar Wind --> a stream of charged protons and eletrons
Solar Prominence --> A violent explosion
Gamma Ray Proton --> energy released
<3 * hope this helps! * <3
Answer:Solar Wind --> a stream of charged protons and eletronsSolar Prominence --> A violent explosionGamma Ray Proton --> energy released
Explanation:
which pattern of change in living things does the fossil record show?
Answers
i think this is helped you )))
Help please I need a. and b. For number 2
Answers
Answer:
they are both dominant
Explanation:
because of the capital P overrides tge lowercase p
Answer:
PP = purple and Pp = purple
Explanation:
Purple is dominant in both genotypes.
Father
B b
Mother
B
b
BB
Bb
Bb
bb
B=dominant
b = recessive
The gene for brown hair (B) in Goats
Consider the possible genotypes of the offspring of two heterozygous brown goats. The ratio of brown to white
offspring in this case would be
A)
1:3.
B)
2:2
3:1
D)
3:4
Answers
Answer:
C. 3:1
Explanation:
Bb is still dominate because the bigger letter takes over the smaller letter.
Theres 3 dominate genes (Brown) and 1 recessive (White)
which of the following is a renewable resource?
A. Sunlight
B. Natural gas
C. Copper
D. Coal
Answers
Answer:
Out of the following, the renewable resource is Sunlight.
I think the right answer is Sunlight.
Additional Information:
Those resources which can be reuse again and again is called renewable resources
Hope it will help
What do tuberculosis, HIV, and malaria all have in common?
Group of answer choices
A. They all can be spread through body fluids, such as blood
B. They all respond to antibiotics.
C. They are all spread by parasites.
D. They are all non-transmissible diseases.
Answers
Answer:
"B.) They all respond to antibiotics." Is the correct answer.
Explanation:
Tuberculosis cannot be spread through blood, it is an airborne illness.
Malaria is spread through mosquitoes
They are all Transmissible diseases.
So, the only one that fits this question is B.
In the 2 sentences or less how can we solve global warming
Answers
Explanation: We can turn of the lights when were not using them and use bike rids instead of car rides use solar panels.
What does the Particle Theory of Matter state about the relationship of particle energy
Answers
Fossils of a species of bear are found in layer 5. Which layer is most likely to
have organisms that lived at the same time as the bear species?
Answers
layer 4 brainliest would be appreciated
Explanation:
This is based on relative dating method of layers of rock or fossils. The relative dating method is based on the fact that the older the layer of rock or fossils the deeper it will be situated. The more older the more deeper or conversely the more younger, the less will be the depth of the layer of rock or fossils. Here layer 8 is the deepest layer, so it would possess rock layer with embedded fossils which is the most oldest. Layer 1 is the most superficial layer of rock and would contain fossils which is the most youngest. The species of bear are found in layer 5. Hence the immediate layer covering it is the 4th layer of rock. So, any fossils embedded in layer 4 would belong to the nearest possible time of existence of the b
Fossils of a species of bear are found in layer 5, so the layer that is most likely to have organisms that lived at the same time as the bear species is layer 4, which is present in option A.
What are fossils and rock layers?Fossils are the remains or traces of organisms that lived in the past, and they are often found in sedimentary rock layers. When an organism dies, its remains may be buried by sediment, and over time, the sediment may harden into rock, preserving the remains in the process.
Fossils can also be formed when an organism leaves behind a trace, such as footprints, which are preserved in the sediment and eventually turned into rock. So the fossils of layer 5 are similar to those of layer 4, as they both lived in the same environment.
Hence, fossils of a species of bear are found in layer 5, which is the same as the bear species, which is layer 4, which is present in option A.
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What two things make blood pressure? *
A. pressure caused by contraction of heart ventricle and pressure exerted on blood by
walls of blood vessels
B. pressure caused by contraction of heart atrium and pressure exerted on blood by walls of blood vessels
C. pressure caused by stressful workload and pressure exerted by teachers
D. pressure caused by contraction of heart ventricle and pressure due to gravity
Answers
Answer:
I think it's A, I am not sure
Explanation:
7. Which of the following is NOT found in bacteria? *
a) Cell wall
b) Membrane bound nucleus
Ribosome
d) Plasma membrane
Answers
What are the different possible gametes for AABBDd?
Answers
Answer:
8
Explanation:
Diffrent types AaBbDd
Mining leads to a reduction in
because it destroys
by uprooting forests and demolishing mountainsides.
Answers
Answer:
Your answer is rainfall.
Answer:
biodiversity
habitats
Explanation:
plato
Which of these is not an environmental effect of building dams?
A. increased water temperature
B. soil erosion upstream
C. weed growth downstream
D. reduced fertility downstream
Please help!!! Am taking unit test!! Should give 23 points!
Answers
Answer:
C
Explanation:
Put the following events in the order that they occur for a digital recording to become sound waves through a speaker
(1)The electrical signal moves through a voice coil
(2)The voice coil produces a magnetic field
(3)Changing the magnetic field pushes and pulls on the diaphragm
(4)Sound is encoded on a digital recording
The diaphragm vibcates to produce sound waves
(5)The digital recording plays the sound as an electncal signal
Put the number in orders
———————————
Answers
Answer:
1) sound is encoded on a digital recording as an electrical signal.
2) the digital recording plays the sound as an electrical signal.
3) the electric signal moves through a voice coil
4) The voice coil produces a magnetic field.
5) changing the magnetic field pushes and pulls on the diaphragm.
The ability to do work or cause change is called
energy
O force
O power
Owork
Answers
Answer:
energy
Explanation:
Examine the pattern of the wave shown. What is true about the amplitude and wavelength of the wave when the pattern changes?
Answers
The amplitude of the wave increases while the wavelength decreases.
Wavelength is the distance between one crest or trough to the next and amplitude is the height of the wave from the point of equilibrium.
