NEET BIOLOGY

GENETICS AND EVOLUTION

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Y for yellow body is dominant over y for blue body. What alleles would produce yellow bodies?
A
YY, yy
B
Yy, yy
C
YY only
D
YY, Yy
Explanation: 

Detailed explanation-1: -a pea plant has a yellow pod phenotype, its genotype may either be GG or Gg. phenotype (green pods), then the individual parent having the dominant phenotype must be heterozygous.

Detailed explanation-2: -Typically, we call them either normal or wild-type alleles, or abnormal, or mutant alleles.

Detailed explanation-3: -First Generation We’ll use letters to represent alleles. Capital “A” will represent the yellow pea allele and lowercase “a” will represent the green pea allele. The yellow pea phenotype has a genotype of AA. The green pea phenotype has a genotype of aa.

Detailed explanation-4: -A Punnett square can be used to predict genotypes (allele combinations) and phenotypes (observable traits) of offspring from genetic crosses. A test cross can be used to determine whether an organism with a dominant phenotype is homozygous or heterozygous.

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