Question

A red eyed heterozygous female fruit fly is crossed with a red eyed male. Work all the possible genotypes and phenotypes of the progeny. Comment on the pattern of inheritance of eye colour in fruit flies.

Answer 1

Answer:

hope it will helpful to u

Answer 2

Concept Introduction: Sex Link inheritance is a the basic concept of Genetics.

Explanation:

We have been Given: A red eyed heterozygous female fruit fly is crossed with a red eyed male.

We have to Find: Work all the possible genotypes and phenotypes of the progeny. Comment on the pattern of inheritance of eye colour in fruit flies.

The All possible Genotypes and Phenotypes are:

A Red Eyed Female will give gametes: Xw+ and Xw

A Red Eyed Male will give gametes: Xw+ and Y

On crossing we get,

1. Xw+Xw+(Red Eyed Female)
2. Xw+Xw(Red Eyed Female)
3. Xw+Y(Red Eyed Male)
4. XwY(White Eyed Male)

Therefore the Phenotypic Ratio will be,

$red \: eye \: male : red \: eye \: female : white \: eye \: male \\ = 1 :2 : 1$

Therefore the Genotypic Ratio is,

$1 : 1 : 1 : 1$

Final Answer: The Phenotypic Ratio is

$1 : 2 : 1$

The Genotypic Ratio is

$1 : 1 : 1 : 1$

#SPJ2