In fruit flies, the allele for white eyes is recessive to the allele for red eyes. In a generation of fruit flies, 45 males with white eyes, 46 females with white eyes, 44 males with red eyes, and 47 females with red eyes are produced. Which of the following is the best conclusion you can make about the parents of this generation?
One parent was heterozygous for eye color and the other was homozygous with red eyes.

Both parents were homozygous with red eyes.

One parent had white eyes and the other was heterozygous for eye color.

Both parents were heterozygous for eye color.

Question

In fruit flies, the allele for white eyes is recessive to the allele for red eyes. In a generation of fruit flies, 45 males with white eyes, 46 females with white eyes, 44 males with red eyes, and 47 females with red eyes are produced. Which of the following is the best conclusion you can make about the parents of this generation?
One parent was heterozygous for eye color and the other was homozygous with red eyes.

 Both parents were homozygous with red eyes.

 One parent had white eyes and the other was heterozygous for eye color.

 Both parents were heterozygous for eye color.

carolina4567 · Answer

Hi welcome to openstudy. Have any guesses?

carolina4567 · Answer

Hello?

carolina4567 · Answer

Ok, Then the answer for this would be C One parent had white eyes and the other was heterozygous for eye color

carolina4567 · Answer

Ur Welcome

abhisar · Answer

can u explain how ?

carolina4567 · Answer

Sure

carolina4567 · Answer

45 males with white eyes, 46 females with white eyes, 44 males with red eyes, and 47 females with red eyes are produced. So the ratio is roughly 1:1:1:1. Eye colour in fruit flies is a sex-linked inheritance. You can use punnett square to get a clear image on the parent's genotype. Let us analyse the offspring genotypes. Since there is white eye males, the white eye male inherits Y chromosome from the father so it inherits X chromosome with recessive allele from the mother. So the mother has a recessive allele in her genotype. There is also red eye male offspring. It inherit Y chromosome from the father and the X chromosome with dominant allele from the mother. The mother has a dominant allele. Now you can know that the mother is heterozygous and has red eye. There is white eye female offspring. The offspring must inherit 2 recessive alleles from the parents. One from the mother, the another one must come from the father. The father has the recessive allele and the Y chromosome. I hope this helps.

abhisar · Answer

yeah....if assumed roughly

abhisar · Answer

Thnx for bothering @carolina4567 !
$\huge\ddot\smile$

carolina4567 · Answer

Np @Abhisar

abhisar · Answer

For more details u can visit the link below @alyissa.thompson http://www.accessexcellence.org/RC/VL/GG/sex.php

anonymous · Answer

@Abhisar  thank you so much for the link and @carolina4567  thanks for the explanation