by123 chapter 13 - Chapter 13 Meiosis Asexual reproduction...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 13: Meiosis Asexual reproduction- a single individual is the sole parent and passes copies of all its genes to its offspring o Single-celled eukaryotic organisms reproduce asexually by mitotic cell division o A hydra reproduces by budding o Each tree in a circle of redwoods growing from a single parent tree, whose stump is in the center of the circle Sexual reproduction- two parents give rise to offspring that have unique combinations of genes inherited from the two parents Life cycle- the generation-to-generation sequence of stages in the reproductive history of an organism, from conception to production of its own offspring Locus- a gene’s specific location along the length of a chromosome Each human somatic cell has 46 chromosomes. Chromosomes differ in size, in the positions of their centromeres, and in the pattern of colored bands produced by certain stains. o There are two chromosomes of each 23 types. o Karyotype- ordered display of chromosomes by size and shape. Shows homologous chromosomes easily o Homologous chromosomes- two chromosomes composing a pair have the same length, centromere position, and staining pattern. Both chromosomes of each pair carry genes controlling the same inherited characters. X and Y chromosomes- chromosomes that determine sex
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/07/2009 for the course BY 123 taught by Professor Cusic during the Spring '07 term at University of Alabama at Birmingham.

Page1 / 7

by123 chapter 13 - Chapter 13 Meiosis Asexual reproduction...

This preview shows document pages 1 - 2. Sign up to view the full document.

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