Achondroplasia,a form of dwarfism in humans,is caused by a dominant allele.What is the probability of a heterozygous dwarf man and a normal,homozygous woman having a child who is a heterozygous dwarf?

Question

Quizplus · Accepted Answer

If the man is heterozygous for Achondroplasia (Dd) and the woman is normal homozygous (dd), their possible gametes are:

Man: D or d
Woman: d, d

The possible genotypes of their offspring are: 
Dd or dd

The Punnett square of their cross would be:

|   | D | d |
|---|---|---|
| d | Dd| dd|
| d | Dd| dd|

Therefore, 50% of their offspring would be heterozygous dwarfs (Dd).

Achondroplasia,a Form of Dwarfism in Humans,is Caused by a Dominant