Genetics and Heredity

If the gene for gray fur is recessive (b) and the gene for brown fur is dominant (B), what would the fur of a squirrel with the genotype Bb be

• Brown

• Gray

• Brown and Gray

• Black

Tags

NGSS.HS-LS3-1

When parents with different traits are bred, a trait that reappears in the second generation after disappearing in the first generation is a

• dominant trait
• true-breeding trait
• recessive trait
• characteristic

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The trait for a widow's peak is recessive (r) while the trait for a rounded hairline is dominant (R). If the father has the genotype RR and the mother has the genotype rr, what are the odds that the baby will have a rounded hairline?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

The trait for blonde hair is recessive (b) and the trait for brown hair is dominant (B). If the father and mother have the genotype Bb, what are the odds that the baby will have the heterozygous genotype?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

This pedigree demonstrates that the affected trait is

• Dominant because it skips a generation

• Recessive because it skips a generation

• Dominant because it does not skip a generation

• Recessive because it does not skip a generation

Tags

NGSS.HS-LS3-1

The purpose of a pedigree is to

• track a certain trait that has been passed down through multiple generations

• determine the relatedness of two samples of DNA

• separate DNA based on size

• determine the chromosome number of a species

Tags

NGSS.HS-LS3-1

The trait for straight hair is dominant (S) and the trait for curly hair is recessive (s). if the baby has curly hair what would most likely be the genotypes of the parents?

• SSxss

• SSxSs

• SsxSs

• A and B

Tags

NGSS.HS-LS3-1

The idea that dominant and recessive genes get passed down from parent to offspring was discovered by

• Gregor Mendel

• Rosalind Franklin

• Watson and Crick

• Albert Einstein

In a pedigree, an affected female would be represented by

• A shaded square

• An unshaded square

• An unshade circle

• A shaded circle

If a mom and a dad were to have a baby, which of the following combinations of genotypes would allow for the recessive trait to be expressed in the baby?

• GGxGg

• Ggxgg

• GGxGG

• GGxgg

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2