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romanna [79]
3 years ago
8

Which of the following phenomena is a consequence of Independent Assortment? 1. Pure breeding plants, when mated with each other

, produce completely homozygous offspring. 2. For any gene displaying complete dominance, heterozygous individuals exhibit the dominant phenotype. 2. Smooth seed trait is dominant to wrinkled seed trait in peas. 4. The phenotypic ratio among phenotypes produced from an F1 X F1 dihybrid cross is 9:3:3:1.
Biology
1 answer:
Natalka [10]3 years ago
7 0

Answer: The answer is that the phenotypic ratio among phenotypes produced from an F1 X F1 dihybrid cross is 9:3:3:1.

Explanation:

Independent assortment of genes explains how alleles on different chromosomes arrange independently of one another during gamete formation.

So, a dihybrid cross involving TWO characters (e.g Seed color & seed shape) would have its respective alleles DISTRIBUTED whether dominant or recessive, for crossing to occur and yield varying proportion of offspring in the well spread ratio of 9:3:3:1; making it a consequence of independent assortment of genes

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Answer:

In the cardinals, if the females start using a different criterion than the color of the feather when they choose couple, most likely to happen is that decreased variation in the shades of red because no form of the trait is advantageous.

Explanation:

Options for this question are:

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In the context of natural selection, male cardinals court females using the coloring of their feathers as a form of sexual selection. This means that the shades of red in the feathers are a selection criterion in these birds, and the more visible shades represent an advantage.

But, if the selection criterion was not the color of the feathers, this trait would no longer represent an advantage in the competition between the males to be chosen as a mate. Instead, the trait that would determine sexual selection would be the one that experiences an increase in its variation<em>.</em>

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