1. Blood problems

2. 24. For the following indicate whether it is possible for the
blood type to be created based on the couple's blood
types
Parent 1
Parent 2
Child
Possible? - explanation A O AB B

3. A + A = O?
A or O A - AA
A -
- -
OO?

4. A + AB = O? A B
A or O -
OO?

5. O + B = AB?
B or O B - O
AB?

6. AB + AB = A? A B A?

7. 25. Determine the possible blood types that could be found in the children of a couple who are AB Rh (AB Rh- Rh-) and O Rh+. (Trick)
AB Rh-Rh- x OO Rh+__?
Is it OO Rh+Rh+?
Is it OO Rh+Rh-?
Do both!

8. AB Rh-Rh- x OO Rh+Rh+ O Rh+ A Rh- AO Rh+Rh- A positve B Rh- BO Rh+Rh-
O Rh+
A Rh-
AO Rh+Rh-
A positve
B Rh-
BO Rh+Rh-
B positive

9. AB Rh-Rh- x OO Rh+Rh-
O Rh+
ORh-
A Rh-
B Rh-

10. Okay…. So answer the question. What was that again?
The possible blood types that the couple’s children are:

11. 26. Determine the possible blood types of any children when a woman with type A blood whose parents were both AB Rh- marries a man who is type O Rh- and had a type B Rh+ child from a previous marriage (Trick)
Woman’s genotype?
A Rh-
B Rh-

12. What about the man’s genotype?
What is he again?
O Rh-
That’s recessive for both traits. There’s only one genotype possible:
OO Rh-Rh-

13. Umm…what was the question?
(What could the blood type could their children have?)
Dad
O Rh-
A Rh-
Mom

14. Sex-linked Traits

15. Colour blindness Normal male: XBY Male with colour blindness: XbY
Normal female:
XBXB
Female with colour blindness:
XbXb
Female who is a carrier:
XBXb

16. 31. Determine the possiblity of having a
child who is colour blind if a colour blind
woman marries a man who had a colour
blind father.
XbXb x __Y?
Is it XBY?
Is it XbY?
Do both!

17. XbXb x XBY XB Y Xb
XBXb
XbY

18. XbXb x XbY Xb Y
XbXb
XbY

19. …Just check the question already
3 in 4.

20. 32. Determine the possiblity of two colour
blind people having a normal colour
vision child.
Why does that sound familiar?
Oh yeah, we did that already.
Answer: _________

21. 33. Determine the possiblity of two parents
who each had a colour blind mother of
having a colour blind child.
Gotta find the genotype of the two parents first,
then I can see what their offspring are like.
They have a colour blind mother, but what about
the father? There are two possibililties.

22. Woman: Mother and father both colour blind
Mother colour blind, father normal XB Y Xb
XBXb
XbY Xb Y
XbXb
XbY
50% of the girls are colour blind

23. Man: Mother colour blind, father normal
Mother and father both colour blind XB Y Xb
XBXb
XbY Xb Y
XbXb
XbY
100% of the boys are colour blind

24. The answer is that there is a 50% chance
that these parents could have a colour
blind child.

25. Gene Frequency Refers to how common a gene is in a population
Take a look at the table in your handout

26. Group A B AB O
USA – white
41.0
10.0
4.0
45.0
USA – negro 26
21.0
3.7
49.3
Swedish
46.7
10.3
5.1
37.9
Japanese
38.4
21.8
8.6
31.2
Hawaiian
60.8
2.2
0.5
36.5
Chinese
25.0
35.0
30.0
Aborigine (Australian)
44.7
2.1
53.1
North American Indian
7.7
1.0
91.2