Question

The Punnett Square shows the cross between two parents who are carriers for sickle cell anemia, a recessive genetic disorder that affects the red blood cells in humans.

The probability that these parents will have an offspring affected with sickle cell anemia is ______.

50
75
100
25

Answer 1

25% like she said ^^^^

Answer 2

25%

Step-by-step explanation:

The Punnett square below makes it clear that at each birth, there will be a 25% chance of you having a normal homozygous (AA) child, a 50% chance of a healthy heterozygous (Aa) carrier child like you and your mate, and a 25% chance of a homozygous recessive (aa) child who probably will eventually die from this condition.