Simple Genetics

Which is homozygous recessive?

• XX

• xx

• Xx

Which of the following is heterozygous?

• MM

• Mm

• mm

Which of the following is homozygous dominant?

• RR

• Rr

• rr

Which of the following is homozygous recessive?

• QQ

• Qq

• qq

Homozygous is when...

• the alleles are the same

• the alleles are different

• the alleles are absent

• the alleles are present

Heterozygous is when...

• the alleles are the same

• the alleles are different

• the alleles are absent

• the alleles are present

Is it possible for a visible trait to skip a generation? Example: Blue eyes

• Yes

• No

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

__________ is a diagram that can be used to predict the possible outcomes of a genetic cross.

• Mendel Square

• Genetic Square

• Punnett Square

• Allele Square

If purple flowers are dominant to white flowers, what would the phenotype be of an individual who has the genotype PP?

• Purple flowers

• White flowers

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