Dihybrid Punnett Squares

In certain birds, yellow feathers (g) are recessive to green feathers (G) and short beaks (l) are recessive to long beaks (L). A bird with genotype ggLl is crossed with a bird with genotype GgLl. What percentage of offspring are expected to have yellow feathers and long beaks?

• 2.5%

• 25%

• 12.5%

• 37.5%

In cats, long hair (H) is dominant to short hair (h), and long tails (T) are dominant to short tails (t). Two cats that are heterozygous for both traits (HhTt) produce a litter of kittens. What percentage of offspring will be homozygous recessive for both traits?

• 2.25%

• 4.25%

• 6.25%

• 8.25%

In plants, being tall (T) is dominant to being short (t), and smooth peas (S) are dominant to wrinkled peas (s). A tall plant with smooth peas (TtSs) is crossed with a short plant with wrinkled peas. What percentage of offspring will be tall with wrinkled peas?

• 2.25%

• 8.25%

• 12.25%

• 25%

In certain birds, green feathers (G) are dominant to yellow feathers (g), and long beaks (L) are dominant to short beaks (l). Two birds that are heterozygous for both traits (GgLl) produce offspring. What percentage of offspring will have genotype GGLL?

• 2.25%

• 4.75%

• 6.25%

• 10%

Tags

NGSS.HS-LS3-3

In a dihybrid cross

• one trait is crossed.

• two traits are crossed.

• four boxes are needed for the punnett square.

• mom's alleles are dominant.

What is the phenotypic rule for a heterozygous crossed with another heterozygous in a dihybrid cross?

• 9:3:3:1

• 1:2:3:4

• 4:4:3:9

___ represents how genes in gametes join if they are on different chromosomes

• Punnett Square

• Pedigree

• Karyotype

In pea plants, round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant to green seeds (y). A plant with genotype RrYy is crossed with a plant with genotype rryy. What percentage of offspring will have wrinkled and green seeds?

• A) 25%

• B) 50%

• C) 75%

• D) 100%

Tags

NGSS.MS-LS4-4

In rabbits, black fur (B) is dominant to brown fur (b), and short ears (S) are dominant to long ears (s). Two rabbits with genotypes BbSs are crossed. What is the probability of producing an offspring with brown fur and long ears?

• A) 6.25%

• B) 12.5%

• C) 18.75%

• D) 25%

Tags

NGSS.MS-LS3-2

In corn plants, purple kernels (P) are dominant to yellow kernels (p), and smooth kernels (S) are dominant to wrinkled kernels (s). A plant with genotype PpSs is crossed with a plant with genotype ppSs. What percentage of offspring will have purple and wrinkled kernels?

• A) 12.5%

• B) 25%

• C) 37.5%

• D) 50%

Tags

NGSS.MS-LS4-4