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

St. Britto Hr. Sec. School - Madurai

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

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

The XX - XY type of sex determination is also known as ________ type.

Haploid - diploid
Lygaeus
Gynandromorphs
Genic balance

A marriage between a colourblind man and a normal woman produces

All carrier daughters and normal sons
50% carrier daughters, 50% normal daughters
50% colourblind sons, 50% normal sons
All carrier offsprings

Phenylketonuria is linked to chromosome__________.

9
10
12
8

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

AB only
A, B and AB
A, B, AB and O
A and B only

People with __________ have 4S chromosomes.

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

Sex index is applicable to ________.

Homogenetic condition
Heterogametic condition
Genic balance
Gynandromorphs

The blood group _________ is called universal recipient.

O
AB
B
A

The blood group _________ is called universal donor.

A
AB
B
O

Patau's syndrome is called __________.

Trisomy - 21
Trisomy - 13
xxy males
xo females

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

20
21
4
23

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

It occurs in birds and some reptiles
Females are homogametic and males are heterogametic
Male produce two types of gametes
It occurs in gypsy moth

The lygaeus type (XX - XY) type of sex determination is seen in ______

Fishes
Chickens
Human beings
Gypsy moth

The ZO - ZZ type of sex determination is seen is _______.

moths
Reptiles
Human beings
Bugs

Kin selection is seen in _______

Honey bees
Drosophila
Grasshopper
Cockroach

The ABO blood group was discovered by ________.

Sturli
Decastelle
Landsteiner
Alexander wiener

Part - B

Generic 5 - Answer All Question

What is colour Blindness? How X-linked gene inherited in the marriage between hemizygous recessive male and normal visioned woman?

Discuss the genic balance mechanism of sex determination with reference to Drosophila.
Give an account of genetic control of Rh factor.

Write notes on chromosomal abnormalities in human beings. (or) What is aneuploidy? Explain it

Discuss the methods adopted for the improvement of human race.

What is extra chromosomal inheritance? Explain with an example

Write a note on allosomal chromosomal abnormalities.

Brief about female heterogamety

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