Question

150. Which of the following is a correct statement?
1) Dominant traits can be expressed in homozygous condition only
2) Recessive traits can be expressed in homozygous condition only
3) Dominant traits cannot be expressed in heterozygous condition
4) Recessive traits can be expressed in heterozygous condition

Answer 1

Which of the following is a correct statement?

Recessive traits can be expressed in heterozygous condition

Answer 2

$\huge\colorbox{yellow}{Áηѕωєя࿐❤}$

(2) Recessive traits can be expressed in homozygous condition only

Explanation:

Alleles are helpful in identification of the two members of a gene pair, which produce opposite contrasting phenotypes. When the two alleles of a gene are identical, the individual is homozygous for that trait, and on the other hand, if there are two different alleles, the individual is heterozygous. A homozygous pair can be either dominant (AA, BB) or recessive (aa, bb). Heterozygous pairs are made up of one dominant and one recessive allele (Aa, Bb). In heterozygous individuals, only one allele, the dominant one, is able to express itself, while the other allele, the recessive, is hidden but still present. According to Mendelian Inheritance, an allele which cannot express itself in presence of other is recessive, hence can be expressed only in homozygous condition.

Hope it Helps :)