In sexually reproducing organism the species specific chromosome number is maintained constantly irrespective of the fusion of gamates from two different sources-Explain.

Which of the following represents an amphidiploid (or allopolyploid) condition? 1. A plant having a chromosome number which is not an exact multiple of the haploid number 2. A plant derived by doubling the chromosomes of F_(1) hybrid of two species 3. A polyploid containing genetically different chromosomes sets derived from two or more species 4. A polyploid species in which the genomes have been derived from the same original species

The sexual reproduction that occurs among two genotypically different organisms belonging to the same species, is called _______.

The sexual reproduction that occurs among two genotypically different organisms belonging to the same species, is called_________

Consider a class of 5 girls and 7 boys. The number of different teams consisting of 2 girls and 3 boys that can be formed from this class, if there are two specific boys A and B, who refuse to be the members of the same team, is