Consider the sex-linked inheritance patterns of a cross between two flies, a white-eyed female (XWX) and a red-

eyed male (xWY). In this case, the inheritance of a sex-linked trait, only the female flies would have red eyes. If this

gene were on a non-sex chromosome, or autosome, what would be the expected outcome for offspring eye color?

There is a 50:50 chance that fly offspring will have red eyes or

white eyes.

Red eyes are not gender specific and 100% of the offspring

would have red eyes.

100% of the male offspring would have red eyes and 50% of the

female offspring would have red eyes.

D)

Red eyes are not gender specific. Depending on the genotype of

the male fly, WW or Ww, either 100% or 50% of the offspring

would have red eyes.

Question

Biology

Keegan James

24 June, 15:04

Consider the sex-linked inheritance patterns of a cross between two flies, a white-eyed female (XWX) and a red-

eyed male (xWY). In this case, the inheritance of a sex-linked trait, only the female flies would have red eyes. If this

gene were on a non-sex chromosome, or autosome, what would be the expected outcome for offspring eye color?

There is a 50:50 chance that fly offspring will have red eyes or

white eyes.

Red eyes are not gender specific and 100% of the offspring

would have red eyes.

100% of the male offspring would have red eyes and 50% of the

female offspring would have red eyes.

D)

Red eyes are not gender specific. Depending on the genotype of

the male fly, WW or Ww, either 100% or 50% of the offspring

would have red eyes.

+3

Answers (2)

Know the Answer?

Ariana Mcconnell · Answer 1

Answer: The correct answer is D. Red eyes are not gender specific. Depending on the genotype of the male fly, WW or Ww, either 100% or 50% of the offspring would have red eyes.

Evelin Flowers · Answer 2

Red eyes are not gender specific and 100% of the offspring

would have red eyes would have red eyes if the gene were on autosome.

Explanation:

If the eye colour is not sex-linked and the traits are on the autosomes.

Genotype for male = XWY or XwY

Genotype for female = XWXW, XWXw. XwXw

Punnet square:

cross between red eye male and white eye male

XW Y

XW XWXW XWY

XW XWXW XWY all oofspring red eye

cross between white eye male and red eye female

Xw Y

XW XWXw XWY

Xw XwXw XwY 1 red male:1 white male: 1 red male : 1 white female

if mother has recessive gene all the male will be white eyed.

all the female progeny will have red eye because father had dominant red eye.

The red eye is dominant over white hence dominant trait will appear.