Question

Albinism in humans is inherited as a simple recessive trait. Consider two families. In one family, two parents without albinism have five children, four without albinism and one with albinism. In the other one, a male without albinism and a female with albinism have six children, all without albinism. Part A Which of Mendel's postulates do these families demonstrate?

Answer 1

Mendel's Law of Dominance states that 'In crossing between organisms for contrasting characters of a pair, only one character of the pair appears in the first generation. ... The character that dominates is called the dominant character, and the one that remains unexpressed is the recessive character.

Explanation: For example, the gene for seed color in pea plants exists in two forms. There is one form or allele for yellow seed color (Y) and another for green seed color (y). In this example, the allele for yellow seed color is dominant, and the allele for green seed color is recessive.

Answer 2

Mendel's law of Dominance is demonstrated by these families.

Step-by-step explanation:

Mendel's Law of Dominance states that the recessive gene will not be expressed in front of Dominant gene. He found that in a heterozygous gene the allele for Dominant trait will mask the trait expressed by recessive trait, also one trait will overshadow the other trait both the traits will not appear in offspring.

Aa X Aa (In first family both parents are heterozygous)

AA X aa ( In second family the father is dominant and mother is recessive and albino, but no child will be albino since all would be heterozygous for the trait.)