1. COLOR Blindness http://colorvisiontesting.com/ishihara.htm
Red/Green color deficiency is most common
Blue/Green color deficiency
Total CVD (color vision deficiency)-shades of gray
Unilateral dichromacy- 1 normal eye - 1 CVD eye
8-12 % Males
Less than 1% females

2. Sex-Linked Traits
Linked to Sex Chromosomes

3. Horace and Thelma
A Colorblind Pedigree

6. They had 4 kids
BOY
BOY
GIRL
BOY

7. Their spouses were:

8. Their GENOTYPES are

11. Their colors are:

12. Their spouses colors
and genotypes

15. If these 2 are the first generation
Then these are the second

19. John and Sophie’s sons are colorblind.
WHY?

20. Will all of Sophie’s boy children be colorblind?
WHY?

21. We see that Stacia is a carrier. How did she get her genotype?
Why is there a ? mark By Liz?

23. We see that Chris is colorblind.
WHY?
Predict Amy’s genotype.

24. Were you correct?
Can you explain it?

26. Why isn’t Brian colorblind – his Dad is colorblind!

27. Faye And Felicia and Audrey have the same genotype as Amy and Liz for much the same reason – which is. . . ?

28. Phil has interesting parents. The technical term is CONSANGUINE
Phil has interesting parents. The technical term is CONSANGUINE. It is widely practiced and encouraged in some religions, such as Islam.

29. Same Grandparents
THEN THESE 2 ARE FIRST COUSINS

30. Same Great Grandparents
THEN THESE 2 ARE SECOND COUSINS

31. It is interesting to determine Penelope’s genotype from her children’s genotypes.

32. Why is Ryan colorblind?

33. Monica is a carrier and her husband is colorblind.
Which of her children will be normal (no carriers.)

34. Is it possible for Alice to be a carrier?