Question

In a monohybrid cross 120 plants are obtained. The ratio of homozygous and heterozygous shall be
A) 40 : 80
B) 60 : 60
C) 20 : 100
D) 10 : 110

Answer 1

B (in monohybrid cross ratio of homozygous and heterozygous is 1:1 that's why for 120 plants ,ratio would be 60:60

Answer 2

Dear Anuj,

◆ Answer -

(B) 60 : 60

● Explaination -

• A monohybrid cross is a cross between two plants with different variations at one genetic trait.
• In monohybrid cross described by Mendel, ratio of homozygous to heterozygous offsprings in 1 : 1.
• Thus here, half the offsprings are homozygous & half are heterozygous.
• Hence, from 120 plants ratio of homozygous to heterozygous plants will be 60:60.

Hope this helped you.