1. Homozygous & Heterozygous Notes

2. What ‘homozygous’ mean?
Homo= same
A genotype (letter coding) that is homozygous means that it has two identical alleles. Either both parents give a dominant allele or both give a recessive allele.
Examples: AA, bb, CC, dd
What ‘homozygous’ mean?

3. What ‘heterozygous’ mean?
Hetero= different
A genotype (letter coding) that is heterozygous means that it has two different alleles. One parent will give a dominant allele and the other will give a recessive allele
Examples: Ee, Ff, Gg, Hh, Jj
What ‘heterozygous’ mean?

4. Homozygous or Heterozygous? Dominant or Recessive?
BB Hh
dd NN
LL ff
Aa Tt
cc Jj
Homozygous
Dominant
Heterozygous
Homozygous
Recessive
Homozygous
Dominant
Homozygous
Recessive
Homozygous
Dominant
Heterozygous
Heterozygous
Homozygous
Recessive
Heterozygous

5. Processing Questions: WRITE THE QUESTION.
Give an example of a Homozygous allele.
Give an example of a Heterozygous allele.
Complete the following Punnett Square
% Homozygous? ___
% Heterozygous? ___ B b b b