Allele is the:

A.Alternate trait of a gene pair
B.Total number of genes for a trait
C.Total number of chromosomes of a haploid set
D.Total number of genes present on a chromosome

Fraternal twins are produced when:

A.two sperms fertilize an ovum and the blastomeres after 1st cleavage separation completely
B.Two ova are fertilized simulataneously by two different sperms
C.One sperm fertilizes an ovum and two blastomeres of 1st cleavages separate completely
D.None of these things happen