SEX DETERMINATIO
BLOOD GROUP SUMMARIES
PHENOTYPE A B AB O
BLOOD GROUPS
ANTIGENS anti-B Anti-A none Anti- A and Anti-B
ANTIBODIES IN A antigen B antigen A and B antigens none
BLOOD
POSSIBLE IA IA or IA i IB IB or IB i IA IB ii
GENOTYPES
RECEIVE BLOOD B and O B and O A, B and O O
FROM?
CAN DONATE A and AB B and AB AB A, B, AB and O
BLOOD TO?
- 50% chance that child born male or female
- 23 pairs chromosomes
- sex determined by sex chromosome/gonosomes —-> X or Y
- we therefore have:
2 x 22 chromosomes (autosomes)
1 x 2 gonosomes
- In a female: 2 x 22 +XX / 44 + XX
- In a male: 2 x 22 + XY / 44 + XY
- female produce eggs only containing X chromosome i.e 22 + X / 22 + X
- A male produce sperm containing either X or Y i.e. 22 + X / 22 + Y
- sperm determine sex of zygote
S
N
BLOOD GROUP SUMMARIES
PHENOTYPE A B AB O
BLOOD GROUPS
ANTIGENS anti-B Anti-A none Anti- A and Anti-B
ANTIBODIES IN A antigen B antigen A and B antigens none
BLOOD
POSSIBLE IA IA or IA i IB IB or IB i IA IB ii
GENOTYPES
RECEIVE BLOOD B and O B and O A, B and O O
FROM?
CAN DONATE A and AB B and AB AB A, B, AB and O
BLOOD TO?
- 50% chance that child born male or female
- 23 pairs chromosomes
- sex determined by sex chromosome/gonosomes —-> X or Y
- we therefore have:
2 x 22 chromosomes (autosomes)
1 x 2 gonosomes
- In a female: 2 x 22 +XX / 44 + XX
- In a male: 2 x 22 + XY / 44 + XY
- female produce eggs only containing X chromosome i.e 22 + X / 22 + X
- A male produce sperm containing either X or Y i.e. 22 + X / 22 + Y
- sperm determine sex of zygote
S
N
