Genetic inheritance

Cards (8)

what are alleles?
different versions of the same gene
what is a dominant allele?
version of a gene where only 1 copy is needed for it to be expressed
what is a recessive allele?
version of a gene where 2 copies are needed for it to be expressed
what is meant when an organism is homozygous?
when an organism has 2 copies of the same allele
what is meant when an organism is heterozygous?
when an organism has 2 different versions of the same gene
what is the genotype?
gene present for a trait
what is the phenotype?
visible characteristic
problem with single gene crosses
most characteristics are controlled by multiple alleles rather than just one