Exam 11: Sexual Reproduction and Meiosis

Which structures indicate where crossing over has occurred?

The pairing of chromosomes along their lengths, which is essential for crossing over, is referred to as

Crossing over between homologous chromosomes takes place during

In life cycles that alternate between haploid and diploid stages, fertilization doubles the number of chromosomes per cell while ______ reduces it in half.

Which best explains the process of meiosis?

Which of the following is likely to occur if you were to prevent cyclin B from associating with its cyclin-dependent kinase near the end of meiosis I?

______ cells contain one set of chromosomes.

All animal cells are diploid except

The point of connection between two sister chromatids, before anaphase II of meiosis separates them, is called the

The Rec8 protein holds sister chromatids together during meiosis.If an individual has a mutation that prevents degradation of Rec8, this would most likely prevent

You are studying meiosis in an organism where 2n= 28.How many chromosomes will be present in each cell after meiosis I is complete but before meiosis II begins?

The synaptonemal complex is

You are comparing the events of meiosis I in cells from several different organisms.You come across one species in which you do not observe any chiasmata.The best conclusion to make is

______ is a process of nuclear division which reduces the number of chromosomes per cell from 2 sets to 1 set.

Which statement about the reductive division of meiosis is false?

Meiosis results in a reassortment of maternal chromosomes (inherited from the mother) and paternal chromosomes (inherited from the father).If n=4 for a given species, and ignoring the effects of crossing over, what is the probability that a gamete will receive only paternal chromosomes?

In meiosis, sister kinetochores are attached to the same pole of the cell during meiosis I, and sister chromatid cohesion is released during anaphase II.What would be the likely result if sister kinetochores were attached to different poles of the cell during meiosis I and sister chromatid cohesion was released during anaphase I?

Non-disjunction is the failure of homologous chromosomes to separate during meiosis I, or the failure of sister chromatids to separate during meiosis II or mitosis.As a result, both homologous chromosomes or both sister chromatids migrate to the same pole of the cell.This produces daughter cells with an imbalance of chromosomes.If 18 pairs of sister chromatids segregate normally during meiosis II in cats (n=19) but we have non-disjunction of 1 pair, then at the end of meiosis II we will have

Why does sexual reproduction require both meiosis and syngamy?

What immediately follows meiosis I?