Question

Consider the following statements and select the options stating which ones are True (T) and which ones are False (F) on the basis of Mendel’s law of dominance.

i. The discrete unit controlling a particular character is called a factor.

ii. Factors occur in pairs known as alleles, of which one is recessive while the other one dominant.

iii. Alleles show blending and both the traits do not recover as such in $F_2$ generation.

iv. Factors occur in pairs.

• A. I – T, ii – T, iii – T, iv –F
• B. I – F, ii – T, iii – T, iv –F
• C. I – T, ii – F, iii – T, iv –F
• D. I – T, ii – T, iii – F, iv –T

Answer 1

The correct option is D I – T, ii – T, iii – F, iv –T

Law of dominance states that characters are controlled by discrete units called factors, which occur in pairs.

Out of two alleles in a paired factor, one allele will always overdo the expression of another. The one which is expressed is called the dominant allele whereas the other one is called recessive.

The alleles do not blend in the hetrozygous individual and both traits are expressed in the $F_2$ generation.