Presentation on theme: "What is a homologous chromosome?"— Presentation transcript:
1 What is a homologous chromosome? ObjectivesWhat is a karyotype?What are homologous chromosomes?Differentiate between autosomes and sex chromosomes.
2 KaryotypeA karyotype is a picture of ALL a person’s chromosomes
3 Autosomes vs. Sex Chromosomes There are two types of chromosomesSex chromosomes are chromosomes that determine genderXX = femaleXY = maleThese are the 23rd pair on a human karyotypeAutosomes are any chromosomes that are not sex chromosomesThese are pairs 1-22 on a human karyotype
4 Check for Understanding How many chromosome pairs do you have?Are your sex chromosomes XX or XY?Where do the pairs come from?
5 Chromosome PairsIn each pair, one chromosome comes from mom and one comes from dadEach pair of chromosomes is referred to as a homologous pair
6 What are homologous chromosomes? Homologous chromosomes are a pair of chromosomesThey have the same size and shape with the same organization.Most importantly, they have the same genes but the version of the gene may be different.Example:Gene=eye colorVersion= brown eyes or blue eyes