In a certain mammal erect ears are dominant over drooping ears In a cross between the 2 types, out - Biology - Principles of Inheritance and Variation

Question

In a certain mammal erect ears are dominant over drooping ears
In a cross between the 2 types, out of the offspring produced in
the F2 generation 3 had erect ears and one had drooping ears What
were the genotypes of the parents Work out the cross

G. Lakshmi · Accepted Answer

Let E be the dominant for erect
ears

Let e be the recessive allele for drooping
ears

Parents ----------- EE x
ee

F1 generation ----------
Ee

Then in F2 generation ---------- (selfing
F1)

Parents ---------------- Ee x
Ee

Offspring Genotypes ------- 1 EE: 2Ee: 1
ee

Offspring Phenotypes ------- 3 Erect: 1
droopy

In a certain mammal erect ears are dominant over drooping ears. In a cross between the 2 types, out of the offspring produced in the F2 generation 3 had erect ears and one had drooping ears. What were the genotypes of the parents. Work out the cross.