Chapter 13 lecture - Chapter 13: meiosis Some vocabulary...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 13: meiosis Some vocabulary and terms. A life cycle of a multi-cellular organism. Major events or stages in meiosis. Comparison of mitosis and meiosis. How meiosis in sexual reproduction introduces variation between individuals?
Background image of page 1

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

View Full DocumentRight Arrow Icon
Asexual and Sexual Reproduction In asexual reproduction , one parent produces genetically identical offspring by mitosis. A clone is a group of genetically identical individuals from the same parent.
Background image of page 2
Asexual and Sexual Reproduction In sexual reproduction , two parents give rise to offspring that have unique combinations of genes inherited from the two parents. Progenies resemble both parents, but different from either one. Progenies are similar but different from each other. Being different is COOL!
Background image of page 3

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

View Full DocumentRight Arrow Icon
Inheritance and resemblance Variation and uniqueness Traits Genes
Background image of page 4
Eye color: brown eyes, blue eyes, green eyes. Height: tall, short Two brown eyed parents give birth to a blue eyed baby. A person’s height is determined by the genetic background, and the environment. Parents do NOT pass on traits to their children. Parents pass on genes to their children. Traits
Background image of page 5

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

View Full DocumentRight Arrow Icon
Genes are made up of segments of DNA. Most DNA is packaged into chromosomes. Each gene has a specific location called a locus on a certain chromosome.
Background image of page 6
• A life cycle is the generation-to- generation sequence of stages in the reproductive history of an organism. • For sexual reproduction, opposite sexes reproduce progenies. • What determines sexes?
Background image of page 7

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

View Full DocumentRight Arrow Icon
Human chromosomes Human somatic cells have 23 pairs of homologous chromosomes. cells in most tissues, i.e. skin cells…. A karyotype is an ordered display of the pairs of chromosomes from a cell. They are metaphase chromosomes in a cultured cell undergoing cell division.
Background image of page 8
Human chromosomes Pair of homologous replicated chromosomes Centromere Sister chromatids Metaphase chromosome 5 μm
Background image of page 9

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

View Full DocumentRight Arrow Icon
The sex chromosomes are called X and Y. Human females have a homologous pair of X chromosomes (XX). Human males have one X and one Y chromosome. The 22 pairs of chromosomes that do not
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/22/2011 for the course CHEM 1307 taught by Professor Staff during the Fall '10 term at University of Houston - Downtown.

Page1 / 41

Chapter 13 lecture - Chapter 13: meiosis Some vocabulary...

This preview shows document pages 1 - 11. Sign up to view the full document.

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