Punnett squares and Protein synthesis quiz 24-25

In humans, dimples (D) are dominant over no dimples (d). A heterozygous individual (Dd) has a child with a homozygous recessive individual (dd). What percentage of their offspring are expected to have dimples?

• 75%
• 50%
• 25%
• 100%

In rabbits, black fur (B) is dominant over white fur (b). Two heterozygous black rabbits (Bb) are crossed. What fraction of the offspring will have white fur?

• 1/4
• 1/8
• 3/4
• 1/2

In snapdragons, flower color shows incomplete dominance. A red-flowered plant (RR) is crossed with a white-flowered plant (WW). What is the expected phenotype of the offspring?

• Pink-flowered plants (RW)
• Red-flowered plants (RR)
• White-flowered plants (WW)
• Pink-flowered plants (RW) and white flowered plants (WW)

In certain breeds of cattle, coat color shows codominance. A red-coated cow (RR) is crossed with a white-coated bull (WW). What will be the phenotype of the heterozygous (RW) offspring?

• Roan coat color (mix of red and white)
• Solid red coat color
• Solid white coat color
• Black coat color

Hemophilia is an X-linked recessive disorder. A female carrier (XXʰ) has children with a healthy male (XY). What is the probability that a male offspring will have hemophilia?

• 50%
• 100%
• 75%
• 25%

Colorblindness is an X-linked recessive trait. A colorblind male (XʰY) has children with a homozygous dominant female (XX). What is the probability that their daughters will be carriers of colorblindness?

• 100%
• 50%
• 25%
• 0%

What macromolecule is created during transcription?

• RNA
• DNA
• Protein
• Carbohydrate

What is a codon?

• A codon is a three-nucleotide sequence that codes for an amino acid.
• A codon is a type of enzyme that synthesizes DNA.
• A codon is a sequence of four nucleotides that codes for a protein.
• A codon is a single nucleotide that carries genetic information.

Which of the following is the genotype for a homozygous recessive trait?

• AA
• Aa
• aa
• aA

Which of the following is a heterozygous genotype?

• AA
• aa
• AAB
• Aa