First slide

Inheritance of One Gene

Question

When a heterozygous tall pea plant is crossed with dwarf pea plant, how many types of genotypes and phenotypes are obtained from the cross.

Easy

A

One type of genotype and one type of phenotype
B

Two types of genotypes and one type of phenotype
C

Two types of genotypes and two types of phenotypes
D

Four types of genotypes and two types of phenotypes.

Solution

Cross is between Tt and tt and the genotypes of offspring would be Tt and tt in equal proportions and phenotypes are tall and dwarf in equal proportions i.e. one Tt one tt, one tall and one dwarf.
Two types of genotypes Tt and tt. Two types of phenotypes tall and dwarf.

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