Meiosis Flashcards
What is a gamete and process produces it?
Gamete is a reproductive cell produced by meiosis
From one cell Meiosis produces ___
4 haploid identical cells
What major events occur is Meiosis 1?
Homologous chromosomes pairing, crossing over, seperation of homologous.
What major events occur is Meiosis 2?
Seperations of sister chromatids
What might happen if the gametes of a species formed by mitosis instead of meiosis?
Would be diploid, leading to genetic abnormalities.
How does a haploid cell differ from a diploid?
Haploid cells have one set of chromosomes (sperm/eggs)
While diploid cells have 2 sets (somatic cells)
What’s the diploid/ haploid number of human chromosomes?
46:23
Compare and contrast anaphase 1 and 2
1; separates homologous chromosomes
2; separates sister chromatids
What’s happens in Meiosis 2 to; Sister chromatids
Separates only during Meiosis 2
What’s happens in Meiosis 2 to; Spindle fibers
Pull chromosomes apart both meiosis 1 and 2
What’s happens in Meiosis 2 to; Nucleus
Disappears and reappears in both mei 1/2
What’s happens in Meiosis 2 to; Homologous chromosomes
Seperates in Meiosis 1
Other name for Down syndrome and what produces it
Trisomy 21: an error in cell division that results in extra copy of an chromosomes 21
How does meiosis lead to genetic diversity
Independent assortment of chromosomes and crossing over
Explain what happens during crossing over
Crossing over shuffles genes between chromosomes during prophase 1, forming tetrads
