Question

Use the information gathered in the X-Linked Inheritance Animation to answer the following question. Since the white-eye trait is X-linked recessive, what result would you expect when crossing a heterozygous red-eyed female with a white-eyed male?

1) all red-eyed males with half of the females having white and half of the females having red eyes

2)all red-eyed females and all white-eyed males

3)all red-eyed females with half of the males having white and half of the males having red eyes

4)all red-eyed progeny

5)In each sex, half of the offspring will have red and half of the offspring will have white eyes.

Answer 1

R encode red colour which is dominant over r allele. Here r allele encode white eye phenotype.

Please look in image for cross:

That's why right option is 4.

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