Genetics POP QUIZ

Chickens can have different types of feathers. Frizzled feathers curl toward a chicken’s head. Assume that feather type is determined by a single gene and that the allele for frizzled feathers is dominant over the allele for straight feathers. In a cross between two chickens with straight feathers, what percentage of the offspring can be expected to have frizzled feathers?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Heterozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

Tags

NGSS.HS-LS3-1

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

Tags

NGSS.HS-LS3-1

How many kids did the mother and father from the first generation have?

• 2
• 4
• 5
• 6

Which individual in the first generation is a carrier?

• The male
• The female
• individual 1
• None of the above

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Complete the punnett square

a

b

c

d

T t bottom row

t t

T t top row

T T

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

According to this Punnett square ​ (a)   Of the offspring will be homozygous dominant, ​ (b)   Of the offspring will be heterozygous, and the remaining 25% will homozygous ​ (c)   . As for the phenotypes, ​ (d)   Of the flowers will be ​ (e)   .

• 25%
• 50%
• recessive
• 75%
• pink
• 100%
• White

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Match the following

• Aa, AA, aa

• Phenotypes

• Aa

• Homozygous Recessive

• AA

• Heterozygous

• aa

• Genotypes

• Alto (tall), bajo (short)

• Homozygous Dominant

Tags

NGSS.MS-LS4-4

When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....

• Incomplete Dominance

• Codominance