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12th Biology Weekly Test -3 ( Zoology - Principles of Inheritance and Variation )

St. Britto Hr. Sec. School - Madurai

12th Biology Weekly Test -3 ( Zoology - Principles of Inheritance and Variation )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

“Universal Donor” and “Universal Recipients” blood group are _and___respectively

AB, O
O, AB
A, B
B, A

Scientists who contributed to karyotyping _______.

Tjio and Levan
John Cotto
Bridges
Wiener

XX - XO type of sex determination is in ______.

Cockroaches
Drosophila
Humans
Moths

The__________ is called null allele.

I^A
I^OI^B
I^O
I^BI^B

Sex index is applicable to ________.

Homogenetic condition
Heterogametic condition
Genic balance
Gynandromorphs

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

Trisomy 21 refers to ___________.

Patau's syndrome
Down's syndrome
Kline filters syndrome
Turners syndrome

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

c. B. Bridges
Henking
Landsteiner
Stevens

Rh factor was discovered in the blood of ________.

Frog
Carp
Rhesus monkey
Calotes

Sex switch genes have been reported in ________.

Grasshopper
Cockroach
Wasp
Drosophila

Part - B

Generic 2 - Answer All Question

What is Lyon's hypothesis?

Distinguish between heterogametic and homogametic sex determination systems

What is a syndrome?

What are holandric genes?

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

Part - C

Generic 3 - Answer All Question

'AB' Blood group individuals are called universal recipients. Justify

What is erythoblastosis foetalis (or) Haemolytic disease of the new born (HDN)? (or) .Write about the incompatiability of Rh-factor.

Differentiate Intersexes from Supersexes

Defme Kin selection.

What are Y linked or holandric genes?

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