Asexual reproduction is when only one parent is needed and there is no fusion of gametes., Offspring produced by asexual reproduction are called clones., Sexual reproduction involves the fusion of male and female gametes, The genetic material in he nucleus of a cell is made up of a chemical called DNA., Long threads of DNA, which are made up of many genes are called chromosomes., A gene is a section of DNA on a chromosome that codes for a certain characteristic., Alleles are different versions of the same gene., A dominant allele is always expressed even if only one copy is present., A recessive allele is only expressed if an individual has two copies and does not have the dominant allele of that gene., Homozygous alleles are both identical for the same characteristic, for example AA or aa., Heterozygous alleles are both different for the same characteristic, for example Aa.,

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