Paper Topic:

Genetics (DNA, Mutations, Cell Division, Protein Synthesis)

Father /Mother A O

A AA (A ) AO (A

B AB (AB ) BO (B 1 ) Possible blood types for the offspring : A , AB , B

2 ) Percentages for each possible blood type from the cross

A : 50 , AB : 25 , B : 25

3 ) Blood type not possible from thi s cross : Blood group O is not possible

Father /Mother A B

B AB (AB ) BB (B

O AO (O ) BO (B B ) 1

Between BO male and AB female , we have AB , B and O

Relative percentages : AB : 25

, B : 50 and O : 25

Blood group A is not possible

Father /Mother A B

B AB (AB ) AB (AB

B AB (AB ) BB (B Between BB male and AB female , we have AB and B

Relative percentages : AB : 75 and B : 25

Blood group O and A are not possible

2 ) What are the percentages ) or probabilities for each blood type in the offspring

3 ) What blood type (s ) would not be possible in a cross between these two parents

Meiosis and Reproduction

During fertilization , the germ cells , namely the sperm and ova contain a haploid chromosome number . These two germ cells fuse to become a diploid cell called a zygote . The zygote continues to divide mitotically afterwards until a new individual offspring is formed

During meiosis , homologous chromosomes that carry dominant and recessive traits pair and they are eventually distributed to different daughter cells , either the dominant or the recessive genes . This gives rise to a high degree of variability

Huntington 's chorea is a genetic dis . it is inherited in a Autosomal dominant manner . It only needs one allele from one parent who has the disease for the offspring to be affected...

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