Question

What are the definite conditions in which Mendel's laws are said to be applicable?

Answer 1

Mendel's Laws:

• Law of Unit factor

1. Genetic factors are controlled by unit factors.
2. The factors exist in pairs in organisms.

• Law of dominance and recessiveness:

1. Only one unit factor of the two expresses itself in the F₁ generation while the other does not.
2. The one which expresses itself is called dominant while the other which fails to express is called recessive.

• Law of segregation

1. During gamete formation, the unit factors that are paired start to segregate or separate randomly.
2. Due to segregation, each gamete receives one or the other unit factors with equal chance.

Conditions in which Mendel's Law is applicable:

1. The location of genes on different chromosomes.
2. The expression of full traits independently of development conditions.
3. The same rate of survival of zygotes of a genotype.
4. The same probability of all kinds of gamete formation by all hybrids in a monohybrid cross.
5. During fertilization the same probability of all possible gametes combinations.