Inheritance and Variation — BIOLOGY STD 12 Science — Question

Dominant characters

Recessive characters

1. The characters that are expressed in the F₁ generation are called dominant characters.

1. The characters that are not expressed in the F₁ generation are called recessive characters. They are prevented from expressing themselves, due to presence of dominant allele.

2. Dominant character is expressed either in homozygous or heterozygous combination.

2. Recessive characters are expressed only when they are in homozygous combination.

3. Dominant characters cannot be masked by recessive characters.
E.g. Round seed and yellow seed are dominant characters in pea plant.

3. Recessive characters are masked by dominant characters.

E.g. Wrinkled seed and green seed are recessive characters in pea plant.