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

If the childs blood group is ‘O’ and fathers blood group is ‘A’ and mother’s blood group is ‘B’ the genotype of the parents will be ______.

(a)

I^A I^A and I^B I^o

(b)

I^A I^o and I^B I^o

(c)

I^A I^o and I^oI^o

(d)

I^oI^o and I^B I^B

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

Lyon

(1)

Barr body

I

(2)

Bridges

R¹

(3)

Landsteiner

Cde

(4)

Wiener

X/A

(5)

Fischer

Why are sex linked recessive characters more common in the male human beings?

What are holandric genes?

Mention the symptoms of Phenylketonuria

Mention two measures under negative eugenics

Mention the symptoms seen in trisomy 13/ Pataus's syndrome.

What is male heterogamety?

Brief about female heterogamety.

Give an account of genetic control of Rh factor.

Why are people with O blood group called as universal donors?

'AB' Blood group individuals are called universal recipients. Justify

What is extra chromosomal inheritance? 

Comment on the methods of Eugenics.

Explain criss-cross pattern of inheritance with an example. (or) Explain Inheritance of colour blindness.