1. Worksheet on Simple Dominance and the Monohybrid Cross

2. Practise:
1. Anastasia has two short haired Persian cats. In Persians long hair is recessive and short hair is dominant. She mates them and the female has a litter of 8 kittens, six had short hair and 2 had long hair. What was the genotype of the parents? What was the genotype of the kittens?
Let: Given:
Find: Punnets:

3. 2. Ismail thought he would try Mendel’s experiment with sunflowers
2. Ismail thought he would try Mendel’s experiment with sunflowers. In sunflowers Tall is dominant over dwarf. What is the height of the offspring in the three following crosses? Tt x tt TT x Tt Tt x tt
Let: Given:
Find: Punnets:

4. 3. Nicolas has decided to go into dairy farming
3. Nicolas has decided to go into dairy farming. He wants a cow that produces lots of milk but has no horns. Polled means hornless and is dominant in Ayrshire’s (these are good milkers) and horned is recessive. A certain Polled bull is bred to three different cows. Find the genotypes of all the animals.
cow A is horned and produces a polled calf
cow B is horned and produces a horned calf
cow C is polled and produces a horned calf
Let: Given:
Find: Punnets: