A scientist is studying flower color in a certain species. Red petals (R) are dominant to white petals (r). If a homozygous red-flowered plant is crossed with a heterozygous red-flowered plant, what is the probability of producing offspring with white petals?*1 point75%25%50%0%27. A farmer is breeding rabbits for fur color. Black fur (B) is dominant to white fur (b). If two rabbits with black fur are crossed and produce offspring with both black and white fur, what can be concluded about the genotypes of the parent rabbits?*1 pointOne parent rabbit is homozygous dominant and the other is homozygous recessive.One parent rabbit is heterozygous and the other is homozygous recessive.Both parent rabbits are homozygous dominant.Both parent rabbits are heterozygous.
Question
A scientist is studying flower color in a certain species. Red petals (R) are dominant to white petals (r). If a homozygous red-flowered plant is crossed with a heterozygous red-flowered plant, what is the probability of producing offspring with white petals?*1 point75%25%50%0%27. A farmer is breeding rabbits for fur color. Black fur (B) is dominant to white fur (b). If two rabbits with black fur are crossed and produce offspring with both black and white fur, what can be concluded about the genotypes of the parent rabbits?*1 pointOne parent rabbit is homozygous dominant and the other is homozygous recessive.One parent rabbit is heterozygous and the other is homozygous recessive.Both parent rabbits are homozygous dominant.Both parent rabbits are heterozygous.
Solution
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The probability of producing offspring with white petals from a cross between a homozygous red-flowered plant (RR) and a heterozygous red-flowered plant (Rr) is 0%. This is because the homozygous red-flowered plant will always contribute a dominant red allele, ensuring that all offspring will at least be heterozygous (Rr) and therefore express the red petal phenotype.
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If two rabbits with black fur (which is dominant) produce offspring with both black and white fur, it can be concluded that both parent rabbits are heterozygous (Bb). This is because if either parent were homozygous dominant (BB), they could not produce offspring with white fur, as they could not contribute the recessive allele necessary for this phenotype. Similarly, if either parent were homozygous recessive (bb), they would have white fur, not black. Therefore, the only possible genotype for both parents is heterozygous (Bb).
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