meiosis i is the part of meiosis that reduces the chromosome number.
meiosis i is the part of meiosis that reduces the chromosome number.
in which part of meiosis does the chromosome number reduced?
meiosis i
interphase is followed by meiosis i and then meiosis ii. meiosis i separates replicated homologous chromosomes, each still made up of two sister chromatids, into two daughter cells, thus reducing the chromosome number by half. during meiosis ii, sister chromatids decouple and the resultant daughter chromosomes are segregated into four daughter cells. for diploid organisms, the daughter cells resulting from meiosis are haploid and contain only one copy of each chromosome. in some species, cells enter a resting phase known as interkinesis between meiosis i and meiosis ii.
meiosis
supposedly, most sheep–goat hybrids die as embryos. hybrid male mammals are often sterile, demonstrating a phenomenon known as haldane's rule. the haldane phenomenon may apply even when the parent species have the same number of chromosomes, as in most cat-species hybrids. it sometimes does not apply when the species chromosome number is different, as in wild horse (chromosome number = 66) with domestic horse (chromosome number = 64) hybrids. hybrid female fertility tends to decrease with increasing divergence in chromosome similarity between parent species. presumably, this is due to mismatch problems during meiosis and the resulting production of eggs with unbalanced genetic complements.
sheep–goat hybrid