3.23 describe patterns of monohybrid inheritance using a genetic diagram

- Monohybrid inheritance is the inheritance of characteristics controlled by a single gene.
- This can be determined using a genetic diagram called Punnett square.
- This shows the possible combinations of alleles that could be produced in the offspring.

Example:

"Show the possible allele combinations of the offspring produced when a pure breeding short plant is bred with a pure breeding tall plant."
- The term "pure breeding" indicates that the individual is homozygous for that characteristic.
- Let: the tall plant's genotype is TT, the short plant's genotype is tt.
- The possible combination of alleles in the offspring, shown in a Punnett square, is:

- This shows that there is a 100% probability of the offspring being tall, as every combination has a dominant allele in it