How do sister chromatids differ from homologous chromosomes? Why are the x and y chromosomes not considered homologous? When does separation of sister chromatids occur? How does a gamete split 23 chromosomes in half? During which of these stages of meiosis do homologous chromosomes form tetrads?
If a pair of homologous chromosomes fail to separate during anaphase of meiosis I, what will be the chromosome number of the four resulting gametes with respect to the normal haploid number (n = 10)? How many pairs of chromosomes do humans have, and the total number of ...
Meiosis differs from mitosis in that DNA replication is followed by the segregation of homologous chromosomes but not sister chromatids. This depends on the formation of interhomolog connections through crossover recombination and on the attachment of sister kinetochores to microtubules emanating from the...
where a duplication of theZIP4gene within thePh1locus prevents maturation of crossovers between non-homologous chromosomes4,5,6,7. ZIP4 is an essential factor for the main crossover pathway8,9(called the class I or ZMM pathway) that also includes a set of other critical proteins...