The test will examine each parent's DNA for evidence of the MC1R gene, which causes redheadedness. "We can... detect if an individual is a carrier of any of the three prevalent redhead variations in the gene MC1R using a simple saliva test to determine deep ancestry," stated Dr.
What causes red hair?
Red hair is a recessive hereditary feature induced by a sequence of mutations in the MC1R gene on chromosome 16. Because red hair is a recessive feature, it must be inherited from both parents.
As a result, there are significantly more persons harboring the red hair mutation than have red hair. Redheads account for around 13% of the Scottish population, with 40% carrying at least one mutation.
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how is the expression of polygenic traits determined
The polygenic traits determined by the expression of its of both. Traits may be qualitative (which include eye color) or quantitative (which include peak or blood pressure).
Polygenic developments are decided through the interactions among numerous exclusive genes, which show incomplete dominance.
There are many exclusive allele combos can probable be constituted of mother and father which might be heterozygous for a polygenic trait managed through 3 exclusive genes with allele pairs Polygenic developments are expressed through the interplay of a couple of genes and the environment.
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what organ systems help the digestive system when your food goes down your stomach?
I think it is the intestines
24.
If a cell has 10% NaCl (salt; or solutes) and 90% water inside of it and the environment it is placed in has the same NaCl to water ratio, in which direction will osmosis occur? (Hint: draw a picture for yourself)
into the cell
out of the cell
no net movement
25.
If a cell has 30% NaCl and 70% water inside of it and the environment outside the cell is 10 % NaCl (salt; or solutes) and 90% water, which direction will DIFFUSION take place? (Hint: draw a picture)
into the cell
out of the cell
no net movement
26.
If a cell has 30% NaCl and 70% water inside of it and the environment outside the cell is 10 % NaCl (salt; or solutes) and 90% water, in which direction will WATER move? (Hint: draw a picture)
into the cell
out of the cell
no net movement
27.
Which of the following is NOT a form of passive transport?
facilitated diffusion
osmosis
simple diffusion
endocytosis
28.
The structure MOST responsible for maintaining homeostasis is:
cytoplasm
mitochondria
cell wall
cell membrane
29.
In the egg lab, what type of solution were we putting the egg in when we had it sit in distilled water?
hypertonic
isotonic
hypotonic
neutral
30.
In the egg lab, what type of solution were we putting the egg in when we had it sit in syrup?
isotonic
hypertonic
hypotonic
neutral
31.
If you are floating aimlessly on a small boat in the middle of the Pacific Ocean with sharks swarming and you are dying of thirst, would it be a lifesaving decision to drink the seawater around you to quench your thirst? THINK! EXPLAIN IN DETAIL USING VOCAB FROM THIS UNIT.
HELP TEST
24. If a cell has 10% NaCl (salt; or solutes) and 90% water inside of it and the environment it is placed in has the same NaCl to water ratio, the direction that osmosis will occur is no net movement; option C is correct.
25. If a cell has 30% NaCl and 70% water inside of it and the environment outside the cell is 10 % NaCl (salt; or solutes) and 90% water, the direction that diffusion will occur is into the cell; option A is correct.
26. If a cell has 30% NaCl and 70% water inside of it and the environment outside the cell is 10 % NaCl (salt; or solutes) and 90% water, the direction in which WATER will move is into the cell; option A.
27. Endocytosis is NOT a form of passive transport; option D is correct.
28. The structure MOST responsible for maintaining homeostasis is the cell membrane; option D is correct.
29. In the egg lab, the type of solution we were putting the egg in when we had it sit in distilled water is hypotonic; option C.
30. In the egg lab, the type of solution we were putting the egg in when we had it sit in syrup is isotonic: option A.
31. If you are floating aimlessly on a small boat in the middle of the Pacific Ocean with sharks swarming and you are dying of thirst, it would not be a lifesaving decision to drink the seawater around you to quench your thirst because the seawater is hypertonic.
What are hypertonic, hypotonic, and isotonic solutions?
A hypertonic solution is a solution whose concentration is greater than the concentration of the solution in the cell.
A hypotonic solution is a solution whose concentration is less than the concentration of the solution in the cell.
An isotonic solution is a solution whose concentration is the same as the concentration of the solution in the cell.
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Why is mitosis important 3 reasons?
Expansion and development. Mitosis is the process by which an embryo develops after a gamete from meiosis has united with another gamete to form an embryo. Cell division is essential for organism development, tissue repair, healing and regeneration, and reproduction. Asexual reproduction is a form of reproduction in which the number of chromosomes or the fusion of gametes are not altered.
Multicellular creatures depend on mitosis to reproduction of new cells for growth and to replace damaged or worn-out cells, such as skin cells. Mitosis serves as Mitosis the main asexual reproductive mechanism for a large number of single-celled organisms.
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One or two countries reducing their CFC emissions will not be enough to stop ozone depletion globally. What do you think the countries of the world should do to reduce CFC emissions?
All the countries of the world need to lower their emission rates in order to reduce CFC emissions globally.
What are CFCs?CFCs is an acronym for chlorofluorocarbons, a group of non-toxic gases consisting of atoms of chlorine, fluorine, and carbon.
The compounds are found artificially in products like aerosol sprays, old refrigerants, and many other man-made products invented to make life generally better for humans. The gases are considered generally safe and unreactive in lower atmospheres down here.
In the stratosphere, however, CFCs are highly reactive. They undergo photolytic decomposition, a process that is largely catalyzed by the availability of UV light in the stratosphere. When this happens, chlorine molecules are released.
The free chlorine molecules react with the protective ozone layer and as a result, the ozone layer gradually gets destroyed. A single chlorine molecule can react with 100,000 ozone molecules.
Thus, in order to protect the ozone layer by reducing the emission of CFCs, all the countries in the world need to put their hands on deck. The whole world shares a single atmosphere. Thus, CFCs released in one part of the world eventually circulate to every part of the world.
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What is the correct order of steps in the cell cycle ?
The cell cycle is a four stage procedure
Gap 1, or G1 phase Synthesis, or S phase Gap 2, or G2 phase Mitosis, or M phaseThe period between cell divisions is represented by the stages G1, S, and G2, which together make up interphase. An individual cell "decides" whether or not to join the cell cycle and divide based on the stimulatory and inhibitory signals it receives.
Checkpoint signalling systems and specialised proteins are used by cells to guarantee correct cell cycle progression. DNA damage is checked for before and after S phase at checkpoints at the end of G1 and the start of G2. Similar to this, a checkpoint in mitosis makes sure that the chromosomes are properly separated in anaphase before the cell's spindle fibers are properly aligned in metaphase.
Hence, cell cycle is sequence of event in organized manner.
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Which of the following is NOT a basic need of plants in order to live?
A.Sunlight
B.Carbon Dioxide
C.Oxygen
D,Water
Answer: C
Explanation:
Describe ways to maintain fish as renewable resources and explain how scientific data are used to manage fish stocks?
Answer:
Electronic sonar and Global Positioning Systems are used to locate the fish. Ships cross the area, dragging huge nets at the right depth to catch them. The usable catch is often cut, packaged, and frozen right on board. Ships can remain on the ocean for several weeks before returning to home port.
Stock assessments are scientific processes that analyze available data using statistical models to produce management advice. That management advice estimates sustainable harvest levels maximizing fishery removals while protecting stocks’ long-term health.
What is distribution of traits?
The alleles of the various genes that each individual chromosome carries are mixed and matched traits with regard to one another, resulting in a distribution of traits.
When comparing populations, differences are typically seen as variations in the frequency distributions of the states (or kinds) of a certain feature (or set of traits). As a result, if two or more populations exhibit the same trait states at the same rates, they are said to be identical. A population's variance and pattern of attributes are influenced by both genetic and environmental variables. During meiosis, chromosomes can switch sections, causing mutations brought on by environmental factors, mistakes in DNA replication, or both.
As a result, we can infer that the alleles of the numerous genes that each chromosome carries are mixed and matched traits in relation to one another, producing a distribution of traits.
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