3. Mendel and Monohybrid inheritance
Describe the work of Gregor Mendel
Describe monohybrid inheritance using punnett square diagrams

4. Mendel

5. Glossary

7. Mendel

8. Genotypes and Phenotypes
The genes that you have. We use letters.. BB – Brown eyes Bb – Brown eyes Bb – blue eyes Eye colour is the phonotype (the characteristic)

10. Homozygous dominant woman and heterozygous man have a baby
Homozygous dominant woman and heterozygous man have a baby. What are the chances of having a baby with blue eyes? My mum has blue eyes and my dad has brown eyes. Show how I ended up with blue eyes

11. Purebred and Hybrid
Purebred - BB Hybrid - Bb

12. 1.
In garden peas, purple flower colour is dominant over white.
A homozygous purple flowered plant is crossed with a white (homozygous) flowered plant.
What is the percentage chance of having a plant with white flowers?
P = Purple
p = white

13. In garden peas, purple flower color is dominant over white.2.
In garden peas, purple flower color is dominant over white.
A purebred purple flowered plant is crossed with a white flowered plant.
What are the chances of having a plant with purple flowers?
P = Purple
p = white

14. 3.
Achondroplasia is an inherited condition Adults with achondroplasia are
much shorter than average height.
This condition is controlled by a gene with two alleles.
The dominant allele (A) codes
for shorter than average height and the recessive allele (a) codes for average height.
(a) Two parents both had achondroplasia. They had a child who grew up to be of
average height.
Use a genetic diagram to show how. What was the % chance of having a child of average height?

15. 4.
a) Mendel crossed together pure breeding pea plants with purple flowers and pure breeding pea plants with white flowers. The offspring plants all had purple flowers.
Use a genetic diagram to show the ratio of plants expected by crossing the purple offspring plants in part a).
Show the parental genotypes and gametes, and the offspring genotypes and phenotypes. Use F and f to represent the alleles.

16. 5.
Brown eyed alleles (B) are dominant over blue eyed alleles (b) in humans.
A heterozygous brown eyes man had a child with a blue eyes woman. What is the % chance of having a child with brown eyes?

17. Sex Determination
What chromosomes determine your sex? What do males have? What do females have? What are the chances you are a boy or a girl? Show how this works using a punnett diagram…......

19. Recessive Disorders
Research a recessive disorder Show how inheritance works using a punnett diagram Write an exam style question to test someone else Swap and complete

21. Family Pedigree

29. Colour Vision

31. vision