In a dihybrid cross, AaBb x AaBb, what fraction of the offspring will be homozygous for both recessive traits?
Dear student,
The dihybrid cross has been shown below:-
Both the parents formed four gametes AB, Ab, aB, and ab. When these gametes were crossed then the fraction of homozygous for both the traits obtained are AABB = 1/16 and for homozygous recessive aabb = 1/16. So, one out of sixteen types of offspring produced were homozygous recessive (aabb) for both the trait and similarly one out of sixteen offspring produced were homozygous dominant (AABB) for both the trait.
Regards
The dihybrid cross has been shown below:-
Both the parents formed four gametes AB, Ab, aB, and ab. When these gametes were crossed then the fraction of homozygous for both the traits obtained are AABB = 1/16 and for homozygous recessive aabb = 1/16. So, one out of sixteen types of offspring produced were homozygous recessive (aabb) for both the trait and similarly one out of sixteen offspring produced were homozygous dominant (AABB) for both the trait.
Regards