Which of the following matches is wrong?

(1) Birds- ZZ(male)- ZW(female)

(2) Drosophila- XY(male)- XX(female)

(3) Humans- XY (male), XX (female)

(4) Cockroach- - XZ(male)- ZZ(female)

In which of the following male heterogamety is not observed?

(1) Insects

(2) Birds

(3) Humans

(4) (1) and (2)

Which of the following is correct ?

(1) Henking discovered the small Y-chromosome.

(2) Drosophila also shows XX-XY sex determination like human.

(3) Birds have ZZ-ZW sex determination, where females are ZZ and males are ZW.

(4) Grasshoppers show XX-XY sex determination. 

What is wrong with respect to sex determination in honey bee?

(1) Unfertilized egg develops as a male by means of parthenogenesis.

(2) Union of sperm and egg develops as a female

(3) All workers and males will have 16 chromosomes while queen will have 32 chromosomes.

(4) Males produce sperms by mitosis.

Sex determination in Honey bee depends upon-

(1) Number of sets of chromosomes present in parents

(2) Number of sets of chromosomes present in progenies

(3) Number of sets of genes present in parents

(4) Number of sets of genes present in progenies

Read the following four statements (A-D)

A.  The characters never blend in heterozygous condition.

B.  Change in a single base pair of DNA does not cause mutation.

C.  Cancer cells commonly show chromosomal aberrations.

D.  In chicken, sex chromosomes in males are ZW and in females are ZZ.

How many of the above statements is/are right?

1.  Two

2.  Three

3.  Four

4.  One 

Males are heterogametic and females are homogametic in

1.  Human beings and birds

2.  Fruit fly and butter fly

3.  Grasshopper and cockroach

4.  Birds and silkworm 

What is the special characteristic feature of haplodiploid sex determination?

1. Males produce sperms by mitosis

2. Number of sets of chromosomes present in progenies will decide their sex

3. Workers will have diploid set of chromosomes.

4. Drones will have haploid set of chromosome.