Question
Biology Question on Principles of Inheritance and Variation
A gene is said to be dominant if :-
A
It expresses it's effect only in homozygous state
B
It expresses it's effect only in heterozygous condition
C
It expresses it's effect both in homozygous I and heterozygous condition.
D
It never expresses it's effect in any condition.
Answer
It expresses it's effect both in homozygous I and heterozygous condition.
Explanation
Solution
Dominant factor is an allele or Mendelian factor which expressess itself in the hybrid (heterozygous) as well as in homozygous state. It is denoted by capital letter (T or D for tallness in pea, R or W for round seeds in pea). A dominant gene in genotype will be expressed even in the presence of a corresponding recessive gene.