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15 Cards in this Set
- Front
- Back
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Chromosome |
Thread like structure in a cell nucleus made up of many genes. DNA packaged up! |
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Gene |
Section of DNA that codes for a particular protein which results in a particular trait. |
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Allele |
Different forms of a gene. One from the mother and one from the father. |
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DNA |
Complex molecule that carries all the genetic information to build an organism's traits. |
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Variation |
Having different characteristics to the parents. Can be continuous or discontinuous. |
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Reproduction |
This involves creating new offspring. Sexual means the sex cells must meet and fuse. (Fertilisation) A zygote is formed. |
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Dominant |
The allele (trait) which is always expressed when it is present ( represented by a capital letter) |
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Recessive |
The allele (trait) which is only expressed when the dominant is absent (represented with a lower case letter) |
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Homozygous |
When both alleles are the same |
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Heterozygous |
When the two alleles are different |
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Pure breeding |
means homozygous - the 2 alleles are the same |
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Genotype |
What the alleles are in the indivdual - BB |
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Phenotype |
The physical appearance of the offspring. How the genotype is expressed |
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Pedigree chart |
Chart showing the genotype and phenotype of several generations |
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Trait |
a genetically determined characteristic. |
