Haemophilia is more common in males because it is a ______.

(a)

Recessive character carried by Y-chromosome

(b)

Dominant character carried by Y-chromosome

(c)

Dominant trait carried by X-chromosome

(d)

Recessive trait carried by X-chromosome

Which of the following phenotypes in the progeny are possible from the parental combination AxB?

(a)

A and B only

(b)

A,B and AB only

(c)

AB only

(d)

A, B, AB and O

Which of the following phenotypes is not possible in the progeny of the parental genotypic combination I^AI^O x I^AI^B?

(a)

AB

(b)

O

(c)

A

(d)

B

Which of the following is true about Rh factor in the offspring of a parental combination DdxDd (both Rh positive)?

(a)

All will be Rh-positive

(b)

Half will be Rh positive

(c)

About ¾ will be Rh negative

(d)

About one fourth will be Rh negative

The ABO blood group was discovered by ________.

(a)

Sturli

(b)

Decastelle

(c)

Landsteiner

(d)

Alexander wiener

The inheritance of blood group is determined by multiple alleles as discovered by _________.

(a)

Landsteiner

(b)

Bernstein

(c)

Alexander castelle

(d)

lyon

The__________ is called null allele.

(a)

I^A

(b)

I^OI^B

(c)

I^O

(d)

I^BI^B

The secretors have the I allele in _______.

(a)

tears

(b)

Gastric juice

(c)

Saliva

(d)

All of these

_________ proposed the existence of 8 alleles at a single Rh locus.

(a)

Fischer

(b)

Landsteiner

(c)

Bernstein

(d)

Wiener

XX - XO type of sex determination is in ______.

(a)

Cockroaches

(b)

Drosophila

(c)

Humans

(d)

Moths

XO females

(1)

Landsteiner

3n female

(2)

Aneuploidy

Lyon

(3)

Wiener

I

(4)

Barr body

R¹

(5)

Bridges