311DCh13 - Chapter 13 pg 248 261 Inheritance(heredity...

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

View Full Document Right Arrow Icon
Chapter 13. pg. 248 – 261 Inheritance (heredity) – transmission of traits from one generation to the next Variation: offspring differ in appearance from parents and siblings Genetics: scientific study of heredity and hereditary variation Genes: hereditary units parents endow their offspring with that contains coded information Tens of thousands of genes constitute our genome Gametes – animal and plant reproductive cells that transmit genes from one generation to the next Locus – a gene’s specific location along the length of a chromosome (plural, loci) Asexual reproduction – a single individual is the sole parent and passes copies of all its genes to its offspring Ex1. Single celled eukaryotic organism by mitotic cell division (DNA is copied and allocated equally to two daughter cells) Ex2. Hydra (related to jellyfish) by budding. Clone – an individual that reproduces asexually gives rise to a clone; group of genetically identical individuals. Sexual Reproduction – two parents give rise to offspring that have unique characteristics of genes inherited from the two parents Somatic cell – any cell other than a gamete has 46 chromosomes Karyotype – display of chromosomes ordered in pairs Homologous chromosomes (homologues) – have same length, centromere position, and staining pattern XX – female XY – male Only small parts of the X and Y are homologous XY called sex chromosomes; all others called autosomes
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 02/01/2011 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas.

Page1 / 5

311DCh13 - Chapter 13 pg 248 261 Inheritance(heredity...

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