Question

У людини ген кароокості є домінантним, а ген блакитних очей - рецесивним. Темноволоса кароока жінка вийшла заміж за світловолосого кароокого чоловіка. Жінка гетерозиготна за геном кольору волосся, а чоловік за геном кольору очей. Яке за фенотипом потомство можна очікувати в цьому шлюбі?

Answer 1

2/4 -кареглазые, темноволосые, 2/4 - кареглазые, светловолосые

Answer 2

Phenotype of Offspring in this Marriage

In this marriage, the woman is heterozygous for the hair color gene (carries one dominant and one recessive allele), while the man is heterozygous for the eye color gene. The dominant allele for hair color is expressed as "karooka" (dark hair), while the recessive allele for eye color is expressed as "blue eyes".

To determine the possible phenotypes of the offspring, we need to consider the possible combinations of alleles that can be inherited from each parent.

The woman can pass on either the dominant allele for hair color (karooka) or the recessive allele for hair color (blond) to her children. The man can pass on either the dominant allele for eye color (not blue) or the recessive allele for eye color (blue) to his children.

Therefore, the possible phenotypes of the offspring in this marriage are as follows:

1. Karooka hair color and not blue eyes: If the woman passes on the dominant allele for hair color (karooka) and the man passes on the dominant allele for eye color (not blue), the child will have karooka hair color and not blue eyes.

2. Karooka hair color and blue eyes: If the woman passes on the dominant allele for hair color (karooka) and the man passes on the recessive allele for eye color (blue), the child will have karooka hair color and blue eyes.

3. Blond hair color and not blue eyes: If the woman passes on the recessive allele for hair color (blond) and the man passes on the dominant allele for eye color (not blue), the child will have blond hair color and not blue eyes.

4. Blond hair color and blue eyes: If the woman passes on the recessive allele for hair color (blond) and the man passes on the recessive allele for eye color (blue), the child will have blond hair color and blue eyes.

Therefore, the potential phenotypes of the offspring in this marriage are karooka hair color with either not blue eyes or blue eyes, as well as blond hair color with either not blue eyes or blue eyes.