OBJECTIVE LIFE SCIENCE
GENETICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Green peas will only appear if the dominant yellow allele is present
|
|
|
Green peas will always appear regardless of the other allele
|
|
|
Green peas will only appear if the dominant yellow allele is not present
|
|
|
Green peas will never appear regardless of the other allele
|
Detailed explanation-1: -The yellow allele masks the effects of the green allele in an individual heterozygous for pea color. Both individuals who are heterozygous and homozygous dominant for pea color will have yellow peas. Only individuals who are homozygous recessive for pea color will have green peas.
Detailed explanation-2: -If a pea plant shows a recessive phenotype, the genotype can only be tt. What are alleles? Some plants fail to produce chlorophyll, and this trait appears to be recessive.
Detailed explanation-3: -Let’s suppose that the allele for yellow seed is Y and that for green seeds is y. Hence the genotype of the heterozygous yellow seeded plant will be “Yy” and that for green seeded plant will be “yy” (as the recessive allele is expressed only in homozygous conditions).