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

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%

Improvement of human race by encouraging the healthy persons to marry early and produce large number of children is called

(a)

Positive eugenics

(b)

Negative eugenics

(c)

Positive euthenics

(d)

Positive euphenics

Which of the following is incorrect regarding ZW-ZZ type of sex determination?

(a)

It occurs in birds and some reptiles

(b)

Females are homogametic and males are heterogametic

(c)

Male produce one type of gamete

(d)

It occurs in gypsy moth

The secretors have the I allele in _______.

(a)

tears

(b)

Gastric juice

(c)

Saliva

(d)

All of these

__________ was first reported by John Cotto.

(a)

Erythroblastosis foetalis

(b)

Haemophilia

(c)

Colour blindness

(d)

Haplodiploidy

One gene 'L' controlling blood groups is named after_________.

(a)

c. B. Bridges

(b)

Henking

(c)

Landsteiner

(d)

Stevens

Which one of the following conditions correctly describes the manner of determining the sex in the given example?

(a)

XO type of sex chromosomes determine male sex in grasshopper

(b)

XO condition in humans as found in Turner syndrome, determines female sex

(c)

Homozygous sex chromosomes (XX) produce male in Drosophila

(d)

Homozygous sex chromosomes (ZZ) determine female sex in birds

Pick out the correct statements
a) Haemophilia is a sex-linked recessive disease
b) Down's syndrome is due to aneuploidy
c) Phenylketonuria is an autosomal recessive gene disorder
d) Sickle cell anaemia is an X-linked recessive gene disorder

(a)

a) A and D are correct

(b)

Band D are correct

(c)

A, C and D are correct

(d)

A, B and C are correct

Identify the correct statement

(a)

Homozygous sex chromosome (XX) produce males in Drosophila

(b)

Homozygous sex chromosome (ZZ) determine female sex in birds

(c)

Heterozygous sex chromosome (XO) determine male sex in grasshopper

(d)

Heterozygous sex chromosome (ZW) determine male sex in gypsy moth

Pick out the odd one out regarding Mendelian disorder.

(a)

Thalassemia

(b)

phenylketonuria

(c)

Albinism

(d)

Huntington's chorea

Which one of the following crosses show 3 : 1 ratio of normal visioned versus carrier blind?

(a)

X^CX^C x X+Y

(b)

X+X^c x X^cY-

(c)

X+X^c x X+Y-

(d)

X+X+ x X^cY-

(i) The females are carriers of haemophilia
(ii) Albinism is classified into alpha and beta types.
(iii) The symbol  stands for mating.
(iv) XXY females suffer from Klinefelters syndrome
(a) i, iii and iv
(b) ii and iv
(c) i and iii
(d) iv only

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

(c) i and iii

Assertion: Phenylketonuria occurs due to the mutation in gene PAH on chromosome 11.
Reason: DOPA is not converted to melanin
Codes:
A. A and R are true, R is the correct explanation of A.
B. A and R are true, R is not the correct explanation of A.
C. A is true, R is false.
D. Both A and R are false.

(a) Barr body
(b) kin selection
(c) honey bees
(d) Haplodiploidy

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

Persons suffering from haemophilia lack the dotting substance called_______

Involuntary jerking of the body and degeneration of nervous system are symptoms of __________.

The term Euphenics was coined by __________.

What is criss-cross inheritance?

What is Lyon's hypothesis?

Mention the genetic makeup of Turner's syndrome person and Klinefelter's syndrome person.

Explain the genetic basis of ABO blood grouping man.

How can erythroblasts foetalis be prevented?

How the Karyotype of lymphocytes was prepared by Tjio and Levan?

What is extra chromosomal inheritance? 

Discuss the methods adopted for the improvement of human race.