Genetics Review

How many alleles does each person carry for a trait?

• 1
• 2
• 3
• 4

How many alleles does a child get from each parent for each trait?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-LS3-1

Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes
• blood types
• Egg sizes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

B = brown eyes; b = blue eyes
Brown eyes are dominant to blue eyes
What is true about the following two brothers that have brown eyes?
Brother 1: BB
Brother 2: Bb

• they have same phenotype and genotype
• they have different genotypes and phenotypes
• they have same phenotype but different genotypes
• they have same genotype but different phenotypes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

Which of the following is homozygous recessive?

• Tt
• tt
• TT
• T

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowered plant from this species?

• rr
• R
• RR
• RR or Rr

Tags

NGSS.HS-LS3-2

If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring? Tall is dominant to short.

• 100% Tt
• 50% Tt, 50% tt
• 75%Tt, 25%tt
• 25%TT, 50%Tt, 25%tt

Tags

NGSS.HS-LS3-1