STAAR Biology EOC Prep

If green is dominant over purple, then what is the genotype for this individual?

• Purple

• Green

• GG

• gg

Tags

NGSS.HS-LS3-1

In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

• Tall = T
  Short = S

• Tall = T
  Short = t

• Tall = t
  Short = T

• Tall = TT
  Short = tt

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

• 0%

• 25%

• 50%

• 75%

Which of the following genotypes is homozygous dominant?

• Yy

• yY

• yy

• YY

What are the phenotype percentages of the offspring?

• 50 % Brown fur and 50% White fur

• 25 % Brown fur and 75% White fur

• 75 % Brown fur and 25% White fur

• 0% Brown fur and 100% White fur

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

If you cross a black guinea pig with a white guinea pig and the offspring are gray, what type of dominant trait would that be.

• incomplete dominance

• codominance

• codependant

• cooperative

What percent of the offspring would be tan when you cross BbxBb?

• 75%

• 25%

• 50%

• 100%

In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?

• It is BB.

• It is Bb

• It is brown

• It is bb.

This is an example of

• Complete dominance

• Mendelian Genetics

• Codominance

• Incomplete Dominance

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

One dog carries homozygous, long-haired traits (SS), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.

• 100%

• 75%

• 50%

• 25%