Question

In certain bacteria, an oval shape (O) is dominant over round (o) and thick cell walls (T) are dominant over thin (t). Show a cross between a heterozygous oval, thick cell walled bacteria with a round, thin cell walled bacteria. What are the phenotypes of the F1 and F2 offspring

Answer 1

Answer:

Phenotypes –  

Oval Thick - OoTt

Oval Thin - Oott

Round Thick - ooTt

Round thin - oott

Explanation:

Given -

Allele "O" is dominant over allele "o"

and allele for thick cell wall "T" is dominant over thin celled wall "t"

Genotype of heterozygous oval, thick cell walled bacteria is OoTt

Genotype of round, thin cell walled bacteria is oott

The cross between the two parents will produce following offspring

OT          Ot      oT ot

ot OoTt Oott      ooTt oott

ot OoTt Oott      ooTt oott

ot OoTt Oott      ooTt oott

ot OoTt Oott      ooTt oott

Phenotypes –  

Oval Thick - OoTt

Oval Thin - Oott

Round Thick - ooTt

Round thin - oott