Alleles a and a are located on a pair of metacentric chromosomes. alleles b and b are located on a pair of acrocentric chromosomes. a cross is made between individuals having the genotypes aa bb and aa bb. label the gametes of the aa bb parent with the chromosomes carrying the correct alleles.

option number one would be youre best option

ok

explanation:

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.