Question

Fill in the blanks to complete the sentences.

Like the height of pea plants, dimples in humans are determined by a single gene. A person with dimples has DD or 

  alleles because dimples are 

 . A person without dimples has 

  alleles because not having dimples is 

 .

Dd

dd

dominant

recessive

Answer 1

Like the height of pea plants, dimples in humans are determined by a single gene. A person with dimples has **DD** or **Dd** alleles because dimples are **dominant**. A person without dimples has **dd** alleles because not having dimples is **recessive**.