Which of the following best describes gametes in animals?

Assume that you were examining a first polar body and noted that it had one copy (dyad) of each chromosome except chromosome 21. Chromosome 21 was completely absent. What would you expect to be the chromosome 21 complement (only with respect to chromosome 21) in the secondary oocyte? What consequences are likely in the resulting zygote if the secondary oocyte was fertilized?

Kuliev and Verlinsky (2004) state that there was a relatively high number of separation errors at meiosis I. In these cases the centromere underwent a premature division, occurring at meiosis I rather than meiosis II. Regarding chromosome 21, what would you expect to be the chromosome 21 complement in the secondary oocyte in which you saw a single chromatid (monad) for chromosome 21 in the first polar body? If this secondary oocyte was involved in fertilization, what would be the expected consequences?

Horse diploid cells contain 64 chromosomes (2n = 64). How many chromosomes will be present in spermatogonium cells?

Horse diploid cells contain 64 chromosomes (2n=64). How many chromosomes will be present in primary oocyte cells?

Horse diploid cells contain 64 chromosomes (2n=64). How many chromosomes will be present in spermatids cells?