Genes and alleles- ks3

• The genotype is the combination of alleles that an individual has.
• Every chromosome is one of a pair so there are two copies of each gene in every genome. 
• A homozygous is when the alleles for a gene are the same. Heterozygous is when the alleles for a gene are different.
• An allele is a version of a gene.
• Alleles can be dominant or recessive to other alleles
• Chromosomes come in pairs become one is inherited from each parent.
• Genetic variation occurs when individuals have different combinations of alleles.
• The phenotype is the observable characteristics of an organism influenced by their genotype.
• A genome is the entire set of genetic material in an organism.
• A gene is a short section of DNA that codes for a protein.
• A karyotype is an image that displays all the chromosomes of an organism.
• A chromosome is a section of DNA containing many genes.
• A ribosome is a structure which makes proteins from amino acids.
• DNA is a polymer with a double helix structure. It is genetic material located in the nucleus that codes for all of our characteristics.