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

Tags

NGSS.HS-LS3-1

*Use scratch paper to solve.

T = long tusks, t = short tusks

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%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

*Use scratch paper to solve.

P = pink, p = yellow

What is the probability of a yellow-horned unicorn if a heterozygous pink-horned unicorn is crossed with another heterozygous pink-horned unicorn?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

Tags

NGSS.HS-LS3-1

B = brown eyes

b = blue eyes

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

• They have same phenotype and genotype

• They have different phenotypes and genotypes

• They have same phenotype, but different genotypes

• They have different phenotypes, but the same genotype

Tags

NGSS.HS-LS3-1

The genotype Aa is called . . .

• Homozygous recessive

• Hybrid

• Purebred

• Homozygous dominant

Which of the following would be a phenotype?

• Aa

• red hair

• heterozygous

• DNA

Which of the following genotypes is Purebred? Select 2 answers.

• aA

• Aa

• AA

• aa

Which of the following genotypes is homozygous dominant?

• Yy

• yY

• yy

• YY