Chapter 13 Meiosis and sexual life cycles.docx

Chapter 13 Meiosis and sexual life cycles.docx - Chapter 13...

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Chapter 13 Meiosis and sexual life cycles Heredity is the transmission of traits from one generation to the next. Sons and daughters are not identical copies of their parents or siblings. Along with inherited similarity there is also variation . Genetics is the study of heredity and hereditary variation. Offspring acquire genes from parents by inheriting chromosomes Parents endow their children with coded information in the form of hereditary units called genes o Inherited information is passed on in the form of each genes specific sequence of DNA, nucleotides. In animals and plants reproductive cells called gametes are the vehicles that transmit genes from one generation to the next o During fertilization, male and female gametes unite passing on genes of both parents to their offspring Every species has a characteristic number of chromosomes. o Humans have 46 chromosomes in their somatic cells- all cells of the body except the gametes and their precursors o
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