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Key concept gametes have half the number of chromosomes that body cells have

Overview
meiosis process by which gametes that contain half the number of chromosomes as the parent body cell are produced. In meiosis, the chromosome or chromosomes duplicate interphase) and homologous chromosomes exchange genetic information (chromosomal crossover) the first division, called meiosis I. The daughter cells divide again in meiosis II, up . contain half the number of chromosomes of an organisms body cell. This means that at fertilization the two reproductive cells (or gametes) combine to form a cell with the appropriate number. Gametes have haploid chromosomes, which means they have half the number of chromosomes of other cells in the body. Gametes have half the number of chromosomes as the somatic cells. For example, human gametes have 23 chromosomes, while human somatic cells have 46 . Chromosomes and Meiosis Body cells are diploid; gametes are haploid. • Fertilization between egg and sperm in reproduction. • Diploid (2n) cells have two copies of every chromosome. –Body cells are diploid. –Half the chromosomes come from each parent. SECTION 61 CHROMOSOMES AND MEIOSIS Study Guide KEY CONCEPT Gametes have half the number of chromosomes that body cells have VOCABULARY somatic cell autosome fertilization gamete chromosome diploid homologous chromosome reproduction haploid meiosis MAIN IDEA: You have body cell s and gametes 1 SECTION CHROMOSOMES AND MEIOSIS Study. When the male and female gametes fuse fertilization and zygote formation, the chromosome number is restored to 2n again. Thus, diploid cells are those which contain a complete set (or 2n number) of chromosomes whereas haploid cells are those that have half the number of chromosomes (or n) in the nucleus. Gamete male and female cells, sperm and eggs that have half the number of chromosomes of the parent cell. Chromosomes and Meiosis Body cells are diploid; gametes are haploid. • Fertilization between egg and sperm in reproduction. • Diploid (2n) cells have two copies of every chromosome. – Body cells are diploid. – Half the chromosomes come from each parent.

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Daughter Cells and Chromosome Number in Mitosis and Meiosis

Chromosomes and Meiosis Body cells are diploid; gametes are haploid. • Fertilization between egg and sperm in reproduction. • Diploid (2n) cells have two copies of every chromosome. –Body cells are diploid. –Half the chromosomes come from each parent. Gametes. cells, haploid reproductive cell that unites with another haploid reproductive cell to form a zygote. DNA in your gametes can be passed on to your -Each body cell contains a set of 46 chromosomes, which come in 23 pairs. -Cells identical to . Chromosomes and Meiosis Body cells are diploid; gametes are haploid. • Fertilization between egg and sperm in reproduction. • Diploid (2n) cells have two copies of every chromosome. – Body cells are diploid. – Half the chromosomes come from each parent.

 

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