Introductory Concepts

Introductory Concepts - the homologous chromosomes was...

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Introductory Concepts Chromatin, Chromosomes Chromatin is a mass of uncoiled DNA and associated proteins called histones . When cell division begins, DNA coils around the proteins forming visible structures called chromosomes . Below: Human chromosomes (female) Haploid, Diploid Diploid cells (2N) have two complete sets of chromosomes. The body cells of animals are diploid. Haploid cells have one complete set of chromosomes. In animals, gametes (sperm and eggs) are haploid. Homologous Chromosomes Homologous chromosomes are two chromosomes that are the same. This happens because diploid organisms have two of each chromosome. Each of the pairs is a homologous pair. One of
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Unformatted text preview: the homologous chromosomes was inherited from the individual's mother and the other one was inherited from the individual's father. For example, the two chromosomes #1 are homologous. However, a chromosome #1 and a chromosome #2 are not homologous because they are different chromosomes. Genes A small segment of DNA that contains the information necessary to construct a protein or part of a protein (polypeptide) is called a gene. Genes are the unit of inheritance. Types of Cell Division A cell divides by pinching into two. Each of two daughter cells produced contains genetic material inherited from the original (parent) cell....
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This note was uploaded on 12/15/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Introductory Concepts - the homologous chromosomes was...

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