Mendel 2 - chromatids for each chromosome How split up...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Mechanisms of Inheritance II 1 copy of each chromosome in each cell Locus A B Alleles Mitosis: Segregation of genetic material into daughter cells:
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 In contrast, sexual reproduction in eukaryotes requires: • Gametes (haploid or 1N) In contrast, sexual reproduction in eukaryotes requires: • Gametes (haploid or 1N) • Which unite to form zygotes (diploid or 2N)
Background image of page 2
3 Mitosis cannot produce gametes. Enter: Meiosis Separation of homologous chromosomes Separation of sister chromatids
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 Chiasmata formation
Background image of page 4
5
Background image of page 5

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

View Full DocumentRight Arrow Icon
6 Comparison Mitosis • “normal” cell division • Produces 2 daughter cells identical to parent • Daughter cells are diploid (2n) Meiosis • Gamete production • Produces 4 daughter cells, differing from • Daughter cells are haploid (1n)
Background image of page 6
7 Key distinctions: • Mitosis & meiosis have different outcomes: – Both replicate DNA & result in 2
Background image of page 7

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

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: chromatids for each chromosome How split up those chromatids differs Mitosis split chromatids and put 1 of each homologous chromosome in each cell Meiosis split homologous chromosomes, then chromatids Net result for meiosis: Differences in genetic composition between parents/ offspring, among offspring Variation due to : New combinations of chromosomes Exchange of chromosomal material 8 sexual reproduction: 2n organism 1n gametes unite to form 2n organism But need all organisms spend most of their life cycle as diploids? 9 sexual reproduction: 2n organism 1n gametes unite to form 2n organism What happens if things go wrong? What does this say about mechanisms of inheritance as a driver of evolutionary change?...
View Full Document

Page1 / 9

Mendel 2 - chromatids for each chromosome How split up...

This preview shows document pages 1 - 9. Sign up to view the full document.

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