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3.1 Genes and chromosomes
A set of key terms for IB biology exams beginning 2016 (includes 3.2)
Terms in this set (15)
A heritable factor, a length of DNA
that influences a specific characteristic.
The position on a chromosome where a gene is found.
The various forms of a gene
Only a few DNA bases
Often the difference between alleles
The process by which new alleles form
The whole genetic information of an organism.
The Human Genome Project
Sequenced the entire base sequence of human genes.
A single circular DNA molecule
Extra rings of DNA which some prokaryotes have
( eukaryotes do not )
Linear DNA molecules associated with histone proteins
Chromosomes which carry the same sequence of genes
( not necessarily the same alleles of these genes.)
Nuclei with two copies of each chromosome
Nuclei with one chromosome of each pair
The number of chromosomes
A characteristic feature of members of a species
An image showing the chromosomes of an organism in homologous pairs, arranged in decreasing length
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