Genetics Review

Which statement is true about dominant and recessive genes?

• Dominant genes mask recessive genes.

• Recessive genes mask dominant genes.

• They are equal.

Tags

NGSS.HS-LS3-2

In alleles, capital letters show:

• Recessive traits.

• Dominant traits.

Homozygous means:

• Different alleles. Ex: Tt

• Same alleles. Ex: tt

Heterozygous means:

• Same alleles. Ex: TT

• Different alleles. Ex: Tt

Tags

NGSS.HS-LS3-2

What is true about genotypes?

• Genotypes are the traits that show up.

• Genotypes are the gene combinations.

Tags

NGSS.HS-LS3-1

Phenotypes refer to:

• Gene combinations.

• Traits that show up.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If you flip a penny one time, what is the probability of it landing on heads?

• 100%

• 75%

• 50%

• 25%

Why do we use Punnett Squares?

• To learn times tables.

• To learn chemistry equations.

• To study probability of genes.

• To understand physics.

Tags

NGSS.HS-LS3-3

Study the Punnett Square. What is the probability of a dominant trait showing up?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

Study the Punnett Square. What is the probability of having heterozygous dominant traits?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-3