Allergic disease – hemorrhagic diathesis in humans is determined by the recessive gene a. Alleles of this gene are found on both the X

Allergic disease – hemorrhagic diathesis in humans is determined by the recessive gene a. Alleles of this gene are found on both the X and Y chromosomes. Determine which children and grandchildren can be expected if: 1) the wife is healthy, the husband is sick (both are homozygous); 2) the husband is healthy (heterozygous), the wife is sick (homozygous).

1) Only healthy children can be expected from the marriage of a homozygous healthy woman and a sick man;
2) a) if a man’s dominant gene is localized on the Y chromosome, and the recessive gene is located on the X chromosome, then sick daughters and healthy sons can be expected from a marriage with a sick woman; b) if in a man the dominant gene is localized on the X chromosome, and the recessive gene is located on the Y chromosome, then sick sons and healthy daughters can be expected from a marriage with a sick woman.

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