Question

Which of the given traits selected by Mendel w.r.t. pea plants, express themselves in both, homozygous as well as heterozygous conditions?

• A. Dominant
• B. Recessive
• C. Both
• D. None of the above
  

Answer 1

The correct option is A

Dominant

The correct option is A.

Explanation of the correct option:

1. In individuals with one copy of the allele, a dominant phenotype is produced, and the expression of another allele is suppressed (recessive allele).
2. A dominant allele can express itself in both homozygous and heterozygous conditions, whereas a recessive allele can only be expressed in homozygous conditions.

Explanation of the incorrect option:

Option B:

1. Homozygous dominant describes an organism with two copies of the same dominant allele, while homozygous recessive describes an organism with two copies of the same recessive gene.
2. Heterozygous denotes that a gene has two alleles in an organism.

Option C:

A dominant allele can express itself in both homozygous and heterozygous conditions, whereas a recessive allele can only be expressed in homozygous conditions.

Option D:

When total dominance is represented in genetic dominance, the phenotype of the heterozygous dominant allele entirely covers the phenotype of the recessive allele.

Final answer: Dominant traits selected by Mendel w.r.t. pea plants express themselves in both, homozygous as well as heterozygous conditions.