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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YY only
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yy only
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Yy only
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YY, Yy and yy
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Detailed explanation-1: -The genotype is often written as YY or yy, for which each letter represents one of the two alleles in the genotype.
Detailed explanation-2: -Answer: YY is the homozygous dominant genotype (2 Y alleles). The phenotype of this genotype is yellow seed color. Yy is the heterozygous genotype (one dominant allele, one recessive allele).
Detailed explanation-3: -One member of each homologous pair of chromosomes in inherited from each parent. Both alleles for a trait are the same in an individual. They can be homozygous dominant (YY), or homozygous recessive (yy).
Detailed explanation-4: -A cross with the homozygous recessive (yy) is a test cross. If the parent of unknown genotype is heterozygous (Yy), half of the offspring will have the recessive trait.