In an allopolyploid organism, what is true regarding the fertility of interspecies hybrids?
A)Interspecies hybrids are fertile due to nonhomology of chromosomes.
B)Chromosome doubling and nondisjunction in gametocytes can lead to homologous chromosome pairing, disjunction, and fertile hybrids.
C)Interspecies hybrids will be fertile so long as there is an even number of chromosomes in the offspring.
D)Mitotic nondisjunction results in haploid cells.
E)Meiotic nondisjunction produces three haploid gametes and one diploid gamete.

Question

Quizplus · Accepted Answer

Interspecies hybrids in an allopolyploid organism are typically fertile because they have multiple sets of chromosomes from different species, which allows for homologous pairing, disjunction, and fertility through chromosome doubling and meiosis. This can occur through either a hybridization event followed by polyploidization or a fusion of two diploid cells from different species. Chromosome doubling results in a tetraploid individual with four sets of chromosomes from the two parental species. Due to nonhomology of the chromosomes, homologous chromosome pairing is less likely to occur, allowing for fertility.

In an Allopolyploid Organism, What Is True Regarding the Fertility