Chapter 13

Chapter 13 - Chapter 13 Offspring acquire genes from...

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Chapter 13 Offspring acquire genes from parents by inheriting chromosomes Gametes are the vehicles that transmit genes from one generation to the next Humans have 46 chromosomes in their somatic cells Somatic cells - all cells of the body except the gametes and their precursors Genes locus- the genes specific location along the length of a chromosome Comparison of Asexual and Sexual Production Asexual- a single individual is the sole parent and passes copies of all its genes to its offspring without the fusion of gametes Exact copies An individual that reproduces asecually gives rise to a clone Sexual Production - two parents give rise to offspring that have unique combinations of genes inherited from the two parents Genetic variation Fertilization and meiosis alternate in sexual life cycles Karyotype - ordered display, arranges in pairs starting with the longest chromosome Homologous chromosomes - two chromosomes composing a pair have the same length centromere position and staining pattern Females- homologous pair of x (xx), Males- (XY) only small parts of the x and y are homologous X and Y chromosomes- sex chromosomes Other- autosomes
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Chapter 13 - Chapter 13 Offspring acquire genes from...

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