A person with a genotype of HbSS has sickle cell disease. A person with a genotype of HbAS allele carries the sickle cell trait. A person with a genotype of HbAA does not have sickle cell disease and does not carry the trait. The Punnett square shows the genotype of two people carrying the sickle cell trait.

Hb

A

S

A

AA

AS

S

AS

SS

What are the chances that their offspring will have sickle cell anemia?

0%

25%

50%

100%

Question

Zaiden Kidd

Biology

6 July, 23:08

A person with a genotype of HbSS has sickle cell disease. A person with a genotype of HbAS allele carries the sickle cell trait. A person with a genotype of HbAA does not have sickle cell disease and does not carry the trait. The Punnett square shows the genotype of two people carrying the sickle cell trait.

Hb

A

S

A

AA

AS

S

AS

SS

What are the chances that their offspring will have sickle cell anemia?

0%

25%

50%

100%

+4

Answers (2)

Know the Answer?

Maximo Coffey · Answer 1

The answer is 25

Explanation:

If you have correctly done the work then you will have 25% normal 50% carrier and 25% sickle cell disease

Steven Jefferson · Answer 2

25%

Explanation:

In order to have sickle cell anemia, a person needs two S alleles. If there is even just one A allele, the person is a carrier but will not actually have it themselves. The punnett square shows that out of 4 offspring, 1 will have the SS genotype (Statistically). 1/4 is 25%.

A S

A AA AS

S AS SS