Mendelian Genetics Quiz

In a population of rabbits, the allele for black fur (B) is dominant over the allele for white fur (b). If two heterozygous rabbits (Bb) are crossed, what is the probability of an offspring having white fur?

• 0%

• 25%

• 50%

• 75%

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VA.BIO.5.c.

A plant species has two alleles for flower color: red (R) and white (r). If a homozygous red-flowered plant is crossed with a homozygous white-flowered plant, what will be the genotype of the F1 generation?

• RR

• Rr

• rr

• Rr and rr

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VA.BIO.5.c.

In a certain species of bird, the allele for long beaks (L) is dominant over the allele for short beaks (l). If two birds with genotypes Ll and ll are crossed, what percentage of their offspring are expected to have short beaks?

• 0%

• 25%

• 50%

• 75%

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VA.BIO.5.c.

In a population of flowers, the allele for tall stems (T) is dominant over the allele for short stems (t). If a heterozygous tall-stemmed plant is crossed with a short-stemmed plant, what is the expected phenotypic ratio of the offspring?

• 1 tall: 1 short

• 3 tall: 1 short

• 1 tall: 3 short

• All tall

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VA.BIO.5.c.

In a certain fish species, the allele for spotted scales (S) is dominant over the allele for plain scales (s). If two heterozygous fish are crossed, what is the probability that an offspring will have plain scales?

• 0%

• 25%

• 50%

• 75%

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VA.BIO.5.c.

A farmer is breeding cattle for coat color, which is determined by two alleles: black (B) and red (b). If a homozygous black cow is crossed with a heterozygous black bull, what is the probability of producing a red calf?

• 0%

• 25%

• 50%

• 100%

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VA.BIO.5.c.

In a population of frogs, the allele for green skin (G) is dominant over the allele for brown skin (g). If two brown-skinned frogs are crossed, what is the probability that their offspring will also have brown skin?

• 0%

• 25%

• 50%

• 100%

Tags

VA.BIO.5.c.

Having a Widow's Peak is dominant (W) over not having one (w). If parent A (WW) and parent B (ww) have a child, what is the likelihood that--

• 100%

• The child will not have a widow's peak

• 0%

• The child will have a widow's peak

• Ww

• The genotype of these children