Punnett Square Variables

In cats, the allele for black fur (B) is dominant over the allele for white fur (b). A heterozygous black-furred cat is crossed with a white-furred cat. Identify the dominant allele, recessive allele, and the genotypes of both parents if the black-furred cat is heterozygous.

Groups:

(a) Dominant

,

(b) Recessive

,

(c) Parent Genotyopes

,

(d) Incorrect

• bb

• BB

• white fur

• B

• black fur

• Bb

• b

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In pea plants, the allele for tall height (T) is dominant over the allele for short height (t). A short pea plant is crossed with a homozygous tall plant. Identify the dominant allele, recessive allele, and the genotypes of the parents.

Groups:

(a) Dominant

,

(b) Recessive

,

(c) Parent Genotype

,

(d) Incorrect

• tall

• tt

• short

• TT

• T

• Tt

• t

Tags

NGSS.HS-LS3-1

In dogs, long ears (L) are dominant over short ears (l). Two long eared dogs that are heterozygous for the trait are crossed. Identify the dominant allele, recessive allele, and the parents’ genotypes.

Groups:

(a) Dominant

,

(b) Recessive

,

(c) Parent Genotype

,

(d) Incorrect

• L

• short

• long

• Ll

• . Ll

• LL

• l

• ll

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In rabbits, straight fur (S) is dominant over curly fur (s). A rabbit with straight fur (heterozygous) is crossed with a rabbit with curly fur. Identify the dominant allele, recessive allele, and the genotypes of the parents.

Groups:

(a) Dominant

,

(b) Recessive

,

(c) Parent Genotypes

,

(d) Incorrect

• SS

• straight

• S

• curly

• Ss

• s

• ss

Tags

NGSS.HS-LS3-2

The shape of flower petals in a certain plant species is controlled by a single gene. Assume that the allele for rounded petals (R) is dominant over the allele for pointed petals (r). If a plant with pointed petals is crossed with a plant heterozygous for rounded petals (Rr) Identify the variables.

Groups:

(a) Dominant

,

(b) Recessive

,

(c) Parent Genotypes

,

(d) Incorrect

• RR

• R

• rr

• Rr

• r

• round

• pointed

Tags

NGSS.HS-LS3-1

Pea plants can have different flower colors. Purple flowers are dominant over white flowers. Assume that flower color is determined by a single gene and that the allele for purple flowers is dominant over the allele for white flowers. Two pea plants with white flowers are crossed. Identify the variables.

Groups:

(a) Dominant

,

(b) Recessive

,

(c) Parent Genotypes

,

(d) Incorrect

• FF

• .ff

• purple

• f

• ff

• white

• Ff

• F

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Rabbits can have different ear shapes. Assume that ear shape is determined by a single gene and that the allele for floppy ears is dominant over the allele for upright ears. Two rabbits with upright ears are crossed. Identify the variables.

Groups:

(a) Dominant

,

(b) Recessive

,

(c) Parent Genotpyes

,

(d) Incorrect

• E

• .ee

• Floppy

• ee

• EE

• Ee

• e

• upright

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3