Two offspring developed in the same uterus but from fertilization of two different ova are
Dizygotic twins
Monozygotic twin
Fraternal twins
Both $(a)$ and $(c)$
What are the characteristic features of a true-breeding line ?
The average ratio of male to female individuals based on $XX$ and $XY$ type of sex determination, in total world of human population is
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child ?
One of the parents of a cross has a mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of ${F_2}$ progenies that mutation is found in
If the genotype of an individual consists of only one type of genes at same locus. It is called