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Term Description Gene A short section of DNA that codes for a particular protein which results in a
characteristic
Allele One or more alternative versions of the same gene
The order of bases in each is slightly different
Genotype The genetic constitution of an organism
Phenotype The expression of the…

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Individuals have two alleles for each gene. Gametes contain only one allele for each
gene. When gametes from two parents fuse together, the alleles they contain form the
genotype of the offspring produced.
Genetic diagrams can be used to predict the genotypes and phenotypes of the offspring
produced if two…

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Humans have 23 pairs of chromosomes. 22 of these pairs have partners that are
identical in appearance, whether in a male or female. The remaining pair are the sex
chromosomes.
Females XX all gametes contain a single X chromosome Male XY gametes contain
either a X or a Y chromosome…

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