Honors Biology Genetics

An allele whose trait only shows up when no dominant allele is present.

• hidden allele

• dominant allele

• recessive allele

• present allele

Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?

• 50% tall and 50% short

• 75%tall and 25% short

• 100%short

Tags

NGSS.HS-LS3-1

A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS3-1

NGSS.MS-LS3-2

If T=Tall & t=short, what is the genotypic ratio?

• 3:1

• 1:2:1

• 1:3

• 2:2

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

One form of a gene is called_______________

• a DNA

• a Phenotype

• a trait

• an allele

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

NGSS.HS-LS3-2

If you have a parent who has GgBb as their genotype, what are the possible alleles they could donate to their gametes?

• GB, Gb, gB, gb

• GB, GB, gb, gb

• Gb, Gb, Gb, GB

• GG, BB, gg, bb

How many offspring will you have in a dihybrid cross? 

• 4

• 8

• 16

• 5

T4 - What genotype is missing from this Punnett Square?

• RrYy

• RRYY

• rryy

• RrYY

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

T4 - Based off this Punnett Square, what fraction of the offspring will have wrinkled, yellow seeds?

• 9/16

• 3/16

• 1/16

• 16/16

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3