Chapter 11 NOTChromosomes and Human Genetics

Chapter 11 NOTChromosomes and Human Genetics - another set...

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Chromosomes and Human Genetics
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Karyotype A picture of your chromosomes at metaphase Why not another phase of mitosis? Chromosomes are easiest seen in metaphase Answers questions about chromosome abnormalities Cultured “in vitro” which means: in glass The opposite term for a living body test is called ___ _____
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Genes Genes - GENEtic information at a certain spot on the chromosome Gene locus - The LOCation of a gene Alleles - Alternative form of a gene Homologous chromosomes - a pair of chromosomes that contains genes for the same trait, one from ma and one from pa
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Chromosome Pairs We have 46 chromosomes that are like volumes of two sets of books Chromosomes 1-22 are called autosomes Chromosomes 23 is called the sex chromosomes Chromosomes 1-22 are paired and both pairs have the same length and shape.
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Chromosome Pairs (cont.) The pairs of chromosomes carry the same hereditary instructions for the same traits Your father gave you one set, your mother
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Unformatted text preview: another set but hers was an alternative edition from your fathers Her set covers the same topics, but are slightly different for many of the instructions Autosomes and Sex Chromosomes Autosomes are 22 pairs that are not the sex chromosomes Autosomes are the same in both sexes The sex chromosmes are the 23 rd pair Sex chromosmes come in two varities: X and Y XX = Female XY = Male Boy Meets Girl Both sexes have an _____ chromosome The X chromosome has more than 2,300 genes MOST of the X chromosome are nonsexual traits (such as blood clotting) The Y chromosome has fewer than 24 genes One is the MASTER GENE for male determination We All Start Out As Females The Master gene determines if a person will become male, if it is not present then the person becomes a _________ So the mother or father determines the sex of the child?...
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This note was uploaded on 10/05/2011 for the course MCB 2010 taught by Professor Staff during the Spring '11 term at Broward College.

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Chapter 11 NOTChromosomes and Human Genetics - another set...

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