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

Three children of a family have blood groups A, AB and B. What could be the genotypes of their parents?

(a)

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

(b)

I^A I^o and I^BI^o

(c)

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

(d)

I^A I^A and I^oI^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

What can be the blood group of offspring when both parents have AB blood group?

(a)

AB only

(b)

A, B and AB

(c)

A, B, AB and O

(d)

A and B only

XO type of sex determination and XY type of sex determination are examples of ______.

(a)

Male heterogamety

(b)

Female heterogamety

(c)

Male homogamety

(d)

Both (b) and (c)

Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colourblind is _____.

(a)

25%

(b)

50%

(c)

100%

(d)

75%

Females with Turners syndrome have ______.

(a)

Small uterus

(b)

Rudimentary ovaries

(c)

Underdeveloped breasts

(d)

All of these

Co-dominant blood group is ______.

(a)

A

(b)

AB

(c)

B

(d)

O

The ABO blood group was discovered by ________.

(a)

Sturli

(b)

Decastelle

(c)

Landsteiner

(d)

Alexander wiener

The__________ is called null allele.

(a)

I^A

(b)

I^OI^B

(c)

I^O

(d)

I^BI^B

Kappa

(1)

bacterium

Gennplasm

(2)

Barr body

Lyon

(3)

Bridges

X/A

(4)

44AA + XO

Turner's syndrome

(5)

eugenics

i)	Downs syndrome	-	Trisomy 13
ii)	Shell coiling in snail	-	Cytoplasmic inheritance
iii)	Kappa particle	-	Sonneborn
iv)	Eugenics	-	Galton

(a) i and iv
(b) i only
(c) ii and iii
(d) i, ii and iv

i)	SRY	-	X Chromosome
ii)	Heterogametic female	-	XX-XO
iii)	Barr body	-	Sex Chromatin
iv)	Rh factor	-	Landsteiner

(a) i and iv
(b) ii and iii and iv
(c) ii only
(d) i and ii

What is haplodiploidy?

What is Lyonisation?

What is criss-cross inheritance?

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

Mention the symptoms of Phenylketonuria

What is a syndrome?

Differentiate Intersexes from Supersexes

What is male heterogamety?

Give an account of genetic control of Rh factor.

Explain the mode of sex determination in honeybees.

What are the applications of Karyotyping?