Question

in humans, a dimple in the chin is a single gene, autosomal dominant characteristic. a man with a dimpled chin, whose mother lacked the dimpled chin, marries a woman without a chin dimple. what proportion of their children would be expected to have a chin dimple

Answer 1

Answer: 100%

Explanation: Since the gene is dominant, lets say the gene is represented as D. The fathers gene is D and the mother who lacks the gene is d.

If you place this into a chart to would be this way

D d

D DD Dd

d DD Dd

The since D is completely dominant of d. All children will 100% get this gene.