Are mules sterile because they are hybrids of two different species or because they have an odd number of chromosomes?

Species A has 2?=82⁢n=8 chromosomes, and species B has 2?=142⁢n=14 chromosomes. Calculate all possible chromosome numbers for the following individuals. Not all answers will be used. Allotriploid offspring of AB - ? Autotetraploid offspring of A-  ?  Allotetraploid offspring of AB - ? Monosomic B - ?  Uniparentaldisomic A - ?  Tetrasomic A - ?

in a robertsonian translocation the formation of viable gametes depends on

Sex determination in birds is different from that in humans. The sex chromosomes in birds are called Z and W, because males have two of the same chromosome (ZZ), whereas females have two different chromosomes (ZW). There is a Z-linked allele in some birds that causes the death of the embryo when the normal dominant allele is not present. What would be the sex ratio in the living offspring of a cross between a male heterozygous for the lethal allele and a normal female? A) What are the genotypes of the parents? Male____ Female____ B)  Which gametes would each form? Male____ Female____   C) Draw your Punnett square below and determine the sex ratios of living offspring.