NEET BIOLOGY

Detailed explanation-1: -BbDD will produce gametes having BD and bD genotypes. BBDd will produce gametes having genotypes BD and Bd. So after cross-fertilization, offspring produced will be having genotypes: BBDD, BBDd, BbDD, BbDd.

Detailed explanation-2: -There are four possible combinations of gametes for the AaBb parent. Half of the gametes get a dominant A and a dominant B allele; the other half of the gametes get a recessive a and a recessive b allele. Both parents produce 25% each of AB, Ab, aB, and ab.

Detailed explanation-3: -The different types of genotypes are-homozygous recessive (pp), homozygous dominant (PP), and heterozygous (Pp). The homozygous dominant and the heterozygous genotypes show the same phenotypes.

Detailed explanation-4: -To calculate the total number of gametes that are produced by a particular genotype, a specific formula 2n is used, where n= number of heterogeneous alleles that are found in the genotype. Here, the given genotype consists of two heterogeneous alleles Bb, and Cc while one homozygous allele is AA.