Exam 11: Sexual Reproduction and Meiosis

Which structure holds two homologous chromosomes together?

Compared to asexual reproduction,the main advantage of sexual reproduction is that it

The zygote has

A cell in G₂ before meiosis begins,compared with one of the four cells produced at the end of meiosis II,has

During meiosis,sister chromatids are held together by

Crossing over between homologous chromosomes takes place during

The pairing of homologous chromosomes is called

Which of the following events occurs first during meiosis?

Evidence of crossing over can often be seen under the light microscope as a structure called a ________.

Why does sexual reproduction require both meiosis and syngamy?

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

A life cycle that regularly alternates between haploid and diploid stages is found in all of the following EXCEPT

Which best explains the process of meiosis?

Chromosomes exchange genetic information by

A geneticist examines a somatic cell from a fly during metaphase of mitosis and determines that 16 chromatids are present.If a germ-line cell from this species divides by meiosis,then at the end of meiosis I (including the first cytokinesis)each cell will contain

Homologous chromosomes pair along their length during prophase I of meiosis.While two homologues are paired,genetic exchange may occur between them in a process called ________.

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

At the end of meiosis II,each of the four resulting cells contains

The fusion of a male gamete with a female gamete is called

Sister chromatids move to opposite poles of the cell during (Check all that apply.)