GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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heterozygous
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polygenic
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homozygous
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recessive
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Detailed explanation-1: -If the results of a test cross reveal that all the offspring resemble the parent being tested. This parent must be homozygous because all the gametes of parents carry the same allele that fuses to form same offsprings.
Detailed explanation-2: -Outcomes Of The Test Cross If the outcome of the test cross is a recessive progeny, then it is deduced that the parent is heterozygous for the allele being tested. If the outcome of the test cross is a dominant progeny phenotypically, then the parent is a homozygous dominant for the allele being tested.
Detailed explanation-3: -The test cross is another fundamental tool devised by Gregor Mendel. 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).