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12th Biology Monthly Test - 2 ( Zoology - Principles of Inheritance and Variation )

St. Britto Hr. Sec. School - Madurai

12th Biology Monthly Test - 2 ( Zoology - Principles of Inheritance and Variation )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Incompatibility of Rh factor can lead to _________ in a pregnant woman.

Haemophilia
Sickle cell anaemia
Aplastic anaemia
erythroblastosis foetalis

Kin selection is seen in _______

Honey bees
Drosophila
Grasshopper
Cockroach

Sex index is applicable to ________.

Homogenetic condition
Heterogametic condition
Genic balance
Gynandromorphs

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

Positive eugenics
Negative eugenics
Positive euthenics
Positive euphenics

People with __________ have 4S chromosomes.

Turner's syndrome
Klinefelter's syndrome
Down's syndrome
Patau's syndrome

ZW-ZZ system of sex determination occurs in

Fishes
Reptiles
Birds
All of these

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

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

Individuals who possess the I antigens related to gene I in body fluids are called_________.

secretors
enzymes
Lymph fluids
hormones

Depending on position of centromere and relative length of two arms human chromosomes can be classified into ________ type.

2
3
4
5

__________ are examples of mendelian disorders.

Thalassemia
Albinism
Phenylketonuria
Haemophilia

21^st trisomy is observed in

Down's syndrome
Patau's syndrome
Turner's syndrome
Klinefelter's syndrome

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

Male heterogamety
Female heterogamety
Male homogamety
Both (b) and (c)

Sex chromatin is also called as _________.

polar body
nucleus
nucleolus
Barr body

Mangolism is a genetic disorder which is caused by the presence of an extra chromosome number

20
21
4
23

Who is the founder of Modern Eugenics movement?

Mendel
Darwin
Fransis Galton
Karl pearson

Part - B

Generic 2 - Answer All Question

What are holandric genes?
What is Lyonisation?

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

Mention two measures under negative eugenics

What is Rh factor or Rh antigen?

Distinguish between heterogametic and homogametic sex determination systems

How does hemophilia affect an individual?

What is a syndrome?

Part - C

Generic 3 - Answer All Question

What are Kappa particles.

Mention the symptoms of Phenylketonuria

What is null allele?
Explain the genetic basis of ABO blood grouping man.

What are Mendelian disorders?

Explain male heterogamety

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

Draw a schematic representation to show ZW - ZZ type of sex determination.

Part - D

Generic 5 - Answer All Question

Give an account of genetic control of Rh factor.

Discuss the methods adopted for the improvement of human race.

Brief about female heterogamety

(i) Defirie Chromosomal Abnormality
(ii) Explain any two Autosomal Aneuploidy in human beings.

Write notes on chromosomal abnormalities in human beings. (or) What is aneuploidy? Explain it
Comment on the methods of Eugenics.

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