Genetics — Monohybrid Cross
Genotype ratio1 TT : 2 Tt : 1 tt
Phenotype ratio3 tall : 1 short
Chance of a tall child75%
Chance of a short child25%
- Cross two heterozygous (Tt) parents
- Produce at least one short (recessive) offspring
- Two TALL parents, a SHORT child — get a 3:1 ratio (25% short)
- Set up a test cross that splits 1:1 (50% short)
- Make every offspring a tall carrier (100% heterozygous Tt)