Sickle Cell Anemia Punnett Square PRACTICE PROBLEMS

What is the dominant trait (A)?

• has sickle cell anemia

• normal

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the recessive trait (a)?

• has sickle cell anemia

• normal

Tags

NGSS.HS-LS3-1

What is the dominant trait (A)?

• has sickle cell anemia

• normal

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are the PARENTAL GENOTYPES (P generation)?

• both parents are homozygous dominant (AA)

• both parents are homozygous recessive (aa)

• both are heterozygous (Aa)

• P1 = AA / P2 = aa

Tags

NGSS.HS-LS3-1

What is the predicted GENOTYPIC ratio for the offspring of these two individuals? (***Use scratch paper to show your work and complete a Punnett Square.)

• 1 (AA) : 2 (Aa) : 1 (aa)

• 2 (AA) : 1 (Aa) : 1 (aa)

• 3 (AA) : 0 (Aa) : 1 (aa)

• 4 (AA) : 0 (Aa) : 0 (aa)

Answer explanation

***Use scratch paper to show your work and complete a Punnett Square.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the predicted PHENOTYPIC ratio for the offspring of these two individuals?

• 4 normal : 0 sickle cell anemia

• 3 normal : 1 sickle cell anemia

• 2 normal : 2 sickle cell anemia

• 1 normal : 3 sickle cell anemia

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3