1. Human Inheritance-text pp 106-110 i) Dominance and recessive- ii) Co dominance – Human Blood groups Other Types of inheritance iii) Single Gene-Multiple alleles (Human Eye Colour) iv) Using Pedigrees v) Gender determination vi) Sex Linkage – X Linked

2. i) Recessive trait

3. Dwarfism - dominant

4. Dominant does not mean you will see lots of examples automatically in populations of individuals. It might be that it is a rare dominant form of a gene (allele) eg; dwarfism. The gene is said to have a low frequency in the human population Similarly recessive traits can be quite common in populations where the trait has a high frequency eg blue eyes in northern European populations eg; Danish, Swedish etc.

5. Dominant

7. Curved little finger - dominant

8. Observable Genetic Traits Characteristicdominant traitrecessive trait EarlobesFree ear lobesAttached ear lobes ForelockWhite forelockNo white forelock Curve of thumbStraight thumbCurved thumb Dimples No dimples PinkyBent pinkyStraight pinky Mid-digit hair No mid-digit hair Tongue rollingAble to rollNot able to roll Writing Handrightleft Crossing legsLeft Leg upRight leg up Second toe Lengthlongershorter

10. ii)Co dominance – Human Blood groups

11. ii)Co dominance – Human Blood groups Both Alleles are expressed in the phenotype

12. iii)Single Gene Inheritance-Multiple Alleles e.g Human Eye Colour

13. Discontinuous(one gene) VS Continuous(many genes) Characteristics

14. iv)Using Pedigrees

15. Create Your own Pedigree for ear lobe attachment

17. v)Gender Determination

18. vi)Sex Linked Diseases eg Colour Blindness(can you see the number)

19. http://www.mediacollege.com/ligh ting/colour/colourblind.html

21. Comparison of X and Y chromosomes

22. X and Y chromosome Comparison

23. Colour Blindness(sex linked) Parents=Carrier female x Normal sited male X X X XY

24. Now do Everyone read pp 106-110 If finding work hard complete Q 1-7 If finding easy -Completed Q13,14,15,16,17,24