AP BIOLOGY

HEREDITY

THE PEDIGREE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The genotype Aa is called . . .
A
Homozygous recessive
B
Hybrid
C
Purebred
D
Homozygous dominant
Explanation: 

Detailed explanation-1: -The genotype of these monohybrid, or heterozygous, plants can be represented as genotype Aa, with the uppercase letter representing the dominant allele and the lowercase letter representing the recessive allele. The F1 hybrid plants were next self-fertilized (Aa×Aa) and this cross is known as a monohybrid cross.

Detailed explanation-2: -No, AA/bb is a pure-bred genotype, but Aa/Bb is a hybrid genotype. The possible genotypes of the pure-bred plants are AA/bb and aa/BB. Shull found that when he crossed the two pure-breds, the offspring grew much better. What is the genotype of the F1 hybrid offspring?

Detailed explanation-3: -A = dominant. a = recessive. AA-homozygous dominant. Aa-heterozygous dominant (individual has both dominant and recessive gene, but only one is expressed) Was this answer helpful?

Detailed explanation-4: -A hybrid organism is one that is heterozygous, which means that is carries two different alleles at a particular genetic position, or locus.

Detailed explanation-5: -Heterozygous refers to having different alleles for a particular trait. If the two versions are different, you have a heterozygous genotype for that gene.

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