Meiosis Flashcards
What are the two types of reproduction?
Asexual, sexual
What are the differences in the two types of reproduction?
Asexual: One parent, clones
Sexual: Two parents, genetically different.
What are homologous chromosomes?
A pair of chromosomes that have similar shapes, sizes, and genetic information.
What is the difference between a haploid and diploid cell?
Haploid: One set of chromosomes (N)
Diploid: Two set (pair) of chromosomes (2N)
Is sperm cell haploid or diploid?
Haploid
Is a liver cell haploid or diploid?
Diploid
Is an egg cell haploid or diploid?
Haploid
Is a stomach cell haploid or diploid?
Diploid
If the diploid number in a liver cell is 52, how many chromosomes are there in the egg of this organism?
26
What produces a zygote?
A combination of a sperm and egg
During meiosis the chromosome number
Is reduced
Meiosis produces haploid reproductive cells called
Gametes
What are the two human gametes?
Sperm and egg
How many times do cells divide during meiosis?
Twice
What are the stages in Meiosis I?
Prophase I, Metaphase I, Anaphase I, Telophase I
What are the stages in Meiosis II?
Prophase II, Metaphase II, Anaphase II, Telophase II
What is a tetrad?
Structure containing 4 chromatids (or 2 homologous chromosomes) that forms during Meiosis
What best describes “crossing over”
An exchange of information between two homologous chromosomes.
What type of material is exchanged during crossing-over?
Genes/genetic material/DNA
Crossing over occurs in what stage of meiosis?
Prophase I
How many cells are formed at the end of Meiosis I?
Two cells
How many copies of chromosomes does each cell have after Meiosis I?
2N chromosomes
Is DNA copied before Meiosis II?
NO!!!
How many cells form at the end of Meiosis II?
Four
