Lecture 14 Feb 28

Lecture 14 Feb 28 - 17:36 Meiosis: reduction division...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
17:36 Meiosis: reduction division Diploid – haploid (46   23) 2 divisions Great genetic diversity Segregation of chromosomes Crossing over Karyotype Photograph of all the chromosomes in a cell Stained with a mixture of dyes Bands Provide a marker so we can tell which chromosomes came from the mom and which  ones came from the dad We have 23 pairs in a karyotype The sex chromosomes  Males are XY, females are XX Autosomes Homologous chromosomes (pairs of chromosomes) Each chromosome is a pair of sister chromatids 92 sister chromatids in all  Meiosis and fertilization: cycle Meiosis   haploid   diploid Diploid phase: the only phase we can see as adults Gametes: haploid, form from germ cells Egg, sperm Plants: alternation of generations Gametophytes
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sporophytes Fungi: opposite of us, haploid phase grows into the individual, and the zygote lasts for a  short period of time, undergoes meiosis and does sexual recombination
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

Lecture 14 Feb 28 - 17:36 Meiosis: reduction division...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online