Meiosis Quiz

homologous chromosomes

chromosomes that are the same size and have the same genes in the same locations.

When egg and sperm begin meiosis they are...

diploid

how many copies of DNA does each gamete cells have

each have 1n DNA

oogenesis

meiosis in females, outcome= 1 ovum, 3 polars

spermatogenesis

meiosis in males

what is the difference between metaphase I and II

metaphase I consists of 1 cells with 2 tetrads. metaphase II consists of 2 cells each with 2 sister chromatid pairs.

can tetrads be found in meiosis II

no, the homogulous chromosomes/pairs have already split into chromatids.

crossing over

occurs during prophase I to increase genetic variation.

when does crossing over occur

prophase I

tetrads

replicated homologous chromosomes that form a total of 4 chromosomes

After telophase I

resulting cells are haploid and have 1 pair of chromosomes

How many copies of DNA do sex cells have upon entering meiosis

4

does meiosis start and end with the same # of DNA

both have 4 copies

tetrad

a pair of homologous chromosomes

gamete

a sex cell such as a sperm or egg