g If the results of a cross produce a greater number of genotypes than phenotypes, you can safely assume: a) A homozygous dominant was crossed to a homozygous recessive. b) A homozygous dominant was crossed to a heterozygote. c) A homozygous recessive was crossed to a heterozygote. d) Two homozygous recessives were crossed. e) There is never a situation where there are more genotypes than phenotypes.

Question

Biology

Lawrence Ortiz

12 June, 04:10

g If the results of a cross produce a greater number of genotypes than phenotypes, you can safely assume: a) A homozygous dominant was crossed to a homozygous recessive. b) A homozygous dominant was crossed to a heterozygote. c) A homozygous recessive was crossed to a heterozygote. d) Two homozygous recessives were crossed. e) There is never a situation where there are more genotypes than phenotypes.

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Andres Young · Answer 1

Option B

Explanation:

Genotype is genetic endowment of an individual. While phenotype is just the observable trait.

There can be a situation where two genotype have the same penotype. This is a common cases when one allele is completely dominant over the other.

Let us take the case of option B, where a homozygous dominant (RR) is crossed to a heterozygote (Rr)

Here R is the allele for red color trait and r is the allele for white color trait and R is completely dominant over r

Now RR * Rr

RR, Rr, Rr, RR

there are two type of genotype RR and Rr but the phenotype is only one i. e red color.

hence, option B is the correct answer