1 / 9

Human Chromosomes

Human Chromosomes. How many chromosomes do humans have?. 46 In 23 pairs – one in each pair from mom, one from dad Matched pair = homologous chromosomes They have the same genes in the same order (but not necessarily the same alleles). Homologous Chromosomes.

asher
Download Presentation

Human Chromosomes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Human Chromosomes

  2. How many chromosomes do humans have? 46 In 23 pairs – one in each pair from mom, one from dad Matched pair = homologous chromosomes They have the same genes in the same order (but not necessarily the same alleles)

  3. Homologous Chromosomes • One in each pair from mother, the other from father • Homologous pairs carry genes controlling the same inherited traits. • Each locus (position of a gene) is in the same position on homologues.

  4. Homologous Chromosomes Eye color locus Hitchhiker thumb locus

  5. Karyotype • A karyotype is an organized profile of a person's chromosomes. In a karyotype, chromosomes are arranged and numbered by size, from largest to smallest. This arrangement helps scientists quickly identify chromosomal alterations that may result in a genetic disorder. • To make a karyotype, scientists take a picture of someone's chromosomes, cut them out and match them up

  6. Humans have 23 Sets of Homologous ChromosomesEach Homologous set is made up of 2 Homologues. Homologue Homologue

  7. Autosomes(The Autosomes code for most of the offspring’s traits) In Humans the “Autosomes” are sets 1 - 22

  8. Sex Chromosomes

  9. Y chromosome X chromosome Sex ChromosomesThe Sex Chromosomes code for the sex of the offspring.** If the offspring has two “X” chromosomes it will be a female. ** If the offspring has one “X” chromosome and one “Y” chromosome it will be a male. In Humans the “Sex Chromosomes” are the 23rd set XX chromosome - female XY chromosome - male

More Related