Genetics Review

Different forms of a gene are called

• homozygous
• traits
• alleles 
• polygenic

In cats, black fur is dominant to white. If two heterozygous black furred cats are crossed, what % kittens would be white?

• 75%
• 50%
• 25%
• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

In order for someone to display a recessive phenotype they must

• have one copy of the recessive allele
• have two copies of the recessive allele
• have two copies of the dominant allele
• any of these are true

A gene is 

• a version of a trait
• a segment of DNA that codes for a protein
• expressed only before birth
• never is influenced by the environment

Tags

NGSS.HS-LS1-1

Cleft chin is dominant. John's father has a cleft chin and his mother doesn't. If John doesn't have a cleft chin, what is his father's genotype?

• impossible to tell
• Tt
• TT
• tt

Tags

NGSS.HS-LS3-1

Dogs display codominance for fur color. If a white dog and a brown dog have puppies, what color would they be?

• light brown
• have patches of both white AND brown
• either of these
• neither of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cats display codominance. White cat and black make black AND white cats. If a black and white cat mates with a white cat, what % of kittens would be white?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

One blue flower is bred with a red flower and all of the flowers produced are purple. what mode of inheritance is displayed here?

• codominance

• incomplete dominance

• sex-linked

• polygenic

incomplete dominance: white, black, and grey. both parents are grey. what % of kids are black?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Polygenic traits result in phenotypes

• that vary and are usually found on a spectrum/bell curve

• like blood types

• where neither allele is completely dominant

• homozygous individuals