OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A parent organism of an unknown genotype is mated in a test cross. Half of the offspring have the same phenotype as the parent. What can be concluded from this result?
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The parent of the unknown genotype is heterozygous
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The parent of the unknown genotype is homozygous dominant
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The parent of the unknown genotype is homozygous recessive
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The parent of the known genotype is heterozygous
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Explanation:
Detailed explanation-1: -A parent organism of unknown genotype is mated in a test cross. Half of the offspring have the same phenotype as the parent. What can be concluded from this result? The parent of unknown genotype is heterozygous.
Detailed explanation-2: -A test cross is a breeding experiment in which an organism with an unknown genotype associated with the dominant phenotype is mated to an organism that is homozygous for the recessive phenotype.
Detailed explanation-3: -In its simplest form, a test cross is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype (and phenotype).
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