Chapter13 - Chapter 13 Meiosis I Chromosomes carry genes a A gene = a discrete unit of hereditary information b Each gene resides at a specific

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Chapter 13 Meiosis I. Chromosomes carry genes a. A gene = a discrete unit of hereditary information b. Each gene “resides” at a specific site on a given chromosome i. Called a LOCUS II. ASEXUAL vs. SEXUAL reproduction a. Asexual = a single parent generating two IDENTICAL offspring via mitosis b. Sexual = two parents generate offspring with UNIQUE combinations of genes “donated” by both parents i. Sexual reproduction INCREASES GENETIC VARIATION III. A karyotype (figure 13.3) a. Defined = stained chromosomes, from a micrograph, arranged in pairs from longest to shortest, ending with the SEX CHROMOSOMES (all others are AUTOSOMES) b. Two chromosomes that are the same = HOMOLOGOUS CHROMOSOMES IV. Haploid vs. Diploid Cell a. A haploid cell has ½ the number of chromosomes normally found in a somatic cell b. A haploid cell is a gamete … i.e., a sperm and egg cells c. A diploid cell has the full complement of chromosomes i. In Humans, a diploid cell carries 23 pairs of chromosomes 1. the DIPLOID NUMBER, therefore, is
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This note was uploaded on 07/08/2011 for the course BIOL 101 taught by Professor Smith during the Spring '11 term at Aachen University of Applied Sciences.

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Chapter13 - Chapter 13 Meiosis I Chromosomes carry genes a A gene = a discrete unit of hereditary information b Each gene resides at a specific

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