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matrenka [14]
3 years ago
5

Can you help me answer this question?

Biology
1 answer:
Anna71 [15]3 years ago
6 0
C possibly, not too sure
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Explain Mendel's law of independent assortment and how the 9:3:3:1 phenotypic ratio among the F2 of a dihybrid cross provides ev
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Explanation:

Mendel's law of independent assortment state that two different genes assort independently in gamete formation.

To reach this conclusion, one has to do a dihybrid cross. This means that two genes responsible for different traits need to be analyzed at the same time.

1) Starting with a <u>parental generation of a cross between two pure lines</u> (homozygous for both genes) <u>with different traits</u>, a plant with yellow and round seeds (YYRR) and another with green and wrinkled seeds (yyrr). <u>The F1 will be phenotypically homogeneous (</u>yellow and round)<u>, and genotypically heterozygous (</u><u>YyRr</u><u>)</u>.

2) If the individuals from the F1 are crossed with one another,  we have to do a Punnett Square to determine the phenotypic ratio of the F2.

  • If the genes assort independently, the F1 individuals will produce their different gametes with the same probability. Each possible gamete will appear in a 1/4 proportion: YR, Yr, yR, yr.
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See the attached image for an illustration of the crosses in each generation and the Punnett Square.

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If a person moved from a cool and wet region to a warm and dry region, which change would the person not have to make?
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<h3>A sudden <u>and extreme change in temperature between inside and outside harms the body.</u>Other problems that can occur owing to sudden dip or rise in temperature are runny nose, asthma attacks, muscular pains, sinusitis, flu, cold, sore throat, severe pains and muscular aches.</h3>

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