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Suppose you have a group of beetles. You find that a white eye color in one...

Suppose you have a group of beetles. You find that a white eye color in one of the beetles is due to a point mutation. Refer to B and b (where B is the allele associated with the dominant phenotype, and b is the allele associated with the recessive phenotype) in order to answer the following questions:

1) The cross of a pure breeding male with white eyes with a pure breeding female with normal eyes leads to all offspring in generation 1 having normal eyes. Are white eyes dominant or recessive?

2) The cross of a generation 1 male with a generation 1 female leads to 75% normal eyes and 25% white eyes in the next generation of offspring. Is it possible that the gene that controls eye color is autosomal in this species of beetle? Why or why not?

3) With the given information, is it possible that the gene controlling eye color is on the x chromosome? Why or why not?

4) From the generation 1 cross, what evidence supports that the gene that controls eye color in this breed is located on the x chromosome?

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Answer #1

1)Ans: white eyes are recessive trait

2) yes it possible that the gene that controls eye colour.genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body.chromosomes are structures with in cells that contain a person's genes.

3) the pair of sex chromosomes determines whether a fetus becomes male or female .males have one x and y chromosomes.a males x comes from his mother and the y comes from his father.females have two x chromosomes,one from the mother and one from the father, incertain ways sex chromosome functions differently than non sex chromosomes.

4) each character or trait is expressed due to a pair of factors or alleles.these are known as genes.gene is a segment of a nucleic acid responsible for expression of a trait, which is present in the nucleus of every cell.

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