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%

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

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

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves