Question

The genotypes of a plant variety were TtHh, Tthh, ttHh and tthh, where T = tallness and H = hairy stem. Which one of the following crosses would produce progeny giving a phenotypic ratio approximately 1 : 1 : 1 : 1
A) TtHh x TtHh
B) TtHh x Tthh
C) TtHh x ttHh
D) TtHh x tthh

Answer 1

Answer:

D

Explanation:

TtHh x tthh=TH,Th,tH,th x th

| TH | Th | tH | th

th | TtHh|Tthh | ttHh|tthh

Genotypes= TtHh,Tthh,ttHh,tthh

phenotypic= Tall Hairy : Tall Hairless : Short Hairy : Short Hairless

phenotypic ratio = 1 : 1 : 1 : 1