genetic diagrams

define alleles

they are different versions of a gene

what are the two types of alleles

dominant allele

recessive allele

define dominant allele

when there is only one allele that is needed to show the trait

define recessive allele

when there needs to be two alleles that is needed to show the trait.

define genotype

the alleles that you have

define phenotype

they are the physical characteristics

how is a dominant and recessive allele shown in genetic diagrams

dominant are capital letters

recessive are small letters

define homozygous

when it has two identical alleles for a gene (CC or cc)

define heterozygous

when it has two different alleles for a gene (Cc or cC)

what does genetic diagrams show

the possible alleles in the offspring

define monohybrid inheritance

how one single gene with two alleles is passed down from the parents to the offspring.

what is a monohybrid cross

a diagram that shows how recessive and dominant trait for a single characteristic are inherited.

what is another way of drawing a genetic diagram

punnet square

how would you use a punnet square

put the possible gametes from one parent at the top and the other down at the side

in each middle suqare fill in the letters from the top and the side that line up the square