Genetics

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Author:
jsiita
ID:
130947
Filename:
Genetics
Updated:
2012-01-27 04:28:45
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genetics
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Description:
IB DP BIO GENETICS
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  1. 4.1.1 State that eukaryote chromosomes are made of DNA and proteins
    • The chromosome is composed of two main molecules.
    • a) DNA
    • b) Proteins called histones.
  2. 4.1.2 Define gene, allele and genome.
    Gene:a heritable factor that controls a specific characteristic.

    Allele: one specific form of a gene, differing form other alleles by one or a few bases only and occupying the same gene locus as other alleles of that gene.

    Genome: the whole genetic information of the organism
  3. 4.1.3 Define gene mutation
    • Gene mutation is a change in the base sequence of an allele.

    The changed base sequence may produce a different amino acid sequence in the protein translated.

    The changed base sequence may not change the protein because of the degenerate nature of the genetic code.

    The expression of the mutated gene may or may not be beneficial to the organism.

    Gene mutation is a change in the base sequence of an allele.

    The changed base sequence may produce a different amino acid sequence in the protein translated.

    The changed base sequence may not change the protein because of the degenerate nature of the genetic code.

    The expression of the mutated gene may or may not be beneficial to the organism.

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