GENETICS IN BLOOD BANK

Question 1

How many pairs of chromosomes do humans have?

Answer 1

23 pairs of chromosome

Question 2

These 23 pairs of chromosomes have:

Answer 2

22 pairs are autosomes
1 pair of sex chromosomes

Question 3

Male sex chromosome:
Female sex chromosome:

Answer 3

Male sex chromosome: XY
Female sex chromosome: XX

Question 4

Most blood group genes are inherited as ____________ and are on autosomal chromosomes:

Answer 4

Codominant

Question 5

ABO gene = Chromosome ____
Rh gene = Chromosome ____

Answer 5

ABO gene = chromosome 9
Rh gene = chromosome 1

Question 6

Who formulated the laws of inheritance?

Answer 6

Gregor Mendel

Question 7

It is used in studying gene frequencies in human populations:

Answer 7

Hardy-Weinberg principle

Question 8

It is the complement of DNA that is inherited (actual genes)

Answer 8

Genotype

Question 9

Presence of two identical alleles at a particular locus (location)

Answer 9

Homozygous genotype

Question 10

Different alleles present at a particular locus (location)

Answer 10

Heterozygous genotype

Question 11

Observable expression of the genotype; description of which antigens are present:

Answer 11

Phenotype

Question 12

Example of phenotype:

Answer 12

Antigens that are expressed on RBC surface

Type A = A antigens
Tytpe B = B antigens
Type AB = AB antigens
Type O = A & B antigens are absent