Question

A breeding experiment dealing with a single trait is called -

• A. Dihybrid
• B. Monohybrid
• C. Monozygous
• D. Heterozygous

Answer 1

The correct option is B

Monohybrid

The correct option is B.

Explanation of the correct option :

1. Monohybrid cross-refers to the inheritance of a single contrasting trait by two parents at a time.
2. For example, a cross of tall (T) and dwarf (t) pea plants (TT x tt).

Explanation of the incorrect option:

Option A:

1. Dihybrid cross-refers to the inheritance of two pairs of contrasting characters by two parents at the same time.
2. For example, a cross of two pea plants, one with yellow and round seeds (YYRR) and the other with green and wrinkled seeds (yyrr).

Option C:

1. The term “monozygous” represents twins being developed from a single zygote.
2. The first division in the zygote produces two identical cells that independently develop into two embryos; monozygotic twins are produced.

Option D:

When the alleles are different, it is known as heterozygous.

Final answer: A breeding experiment dealing with a single trait is called - Monohybrid.