PRINCIPLES OF INHERITANCE AND VARIATION

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Question paper designed by NAVAS CHEEMADAN (HSST ZOOLOGY-SOHSS AREEKODE)
TOTAL QUESTIONS: 45 TOTAL SCORE :180 Each question carry 4 score

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F2 generation in a mendalian cross showed that both genotypic and phenotypic ratios are same as 1:2:1. It represents a case of

4 points

Complete dominance

incomplete dominance

co dominance

none of these

Clear selection

ABO blood group in human are controlled by the gene I. It has 3 alleles- IA, IB, and i. since there are 3 different alleles, 6 different genotypes are possible. How many phenotypes can occur?

4 points

Clear selection

Which Mendelian idea is depicted by a cross in which the F1-generation resembles both the parents?

4 points

Co dominance

in complete dominance

pleotropy

polygenic inheritance

Clear selection

Select the correct statement from the ones given below with respect to Dihybrid cross.

4 points

Tightly linked genes on the same chromosome shows higher recombination

Genes far apart on the same chromosome show very few recombination

Genes loosely linked on the same chromosome show similar recombination as the tightly linked genes

Tightly linked genes on the same chromosome show very few recombinations

Clear selection

Saihawal cows belongs to

4 points

kerala

punjab

maharashtra

Tamilnadu

Clear selection

Recessive trait in pea plant selected by Mendel is

4 points

Inflated Pod

White flower

Round seed

Axial flower

Clear selection

Identify the process

4 points

Vasectromy

stamination

emasculation

hysterectomy

Clear selection

Monohybrid genotypic ratio?

4 points

1:1

3:1

1:2:1

9:3:3:1

Clear selection

Mendel did not propose

4 points

Law of dominance

Linkage

Law of segrgation

Law of independent assortment

Clear selection

In a cross 42 tall and 14 dwarf plants were obtained. Genotype of parents are

4 points

TT×Tt

Tt×tt

Tt×Tt

TT×tt

Clear selection

Mendel’s work was rediscovered in the year

4 points

1900

1901

1902

1953

Clear selection

Back cross is

4 points

F1×F1

F1× recessive parent

F1× dominant parent

F1× any parent

Clear selection

Mating of an individual to a double recessive in order to determine it is homozygous or heterozygous for a character under consideration is called

4 points

Back cross

test cross

Incomplete dominance

Monohybrid cross

Clear selection

Mendel’s first law is called

4 points

Law of segregation

Law of dominance

Law of independent assortment

None

Clear selection

The ratio of 1:1:1:1 is obtained from a cross between the parents

4 points

RRYY×rryy

RRYy×rrYy

RrYY×Rr

RrYy×rryy

Clear selection

According to Mendel each trait is determined by a physical body called

4 points

cistron

gene

allele

factor

Clear selection

Dihybrid phenotypic ratio

4 points

1:2:1

3:1

9:3:3:1

1:2:1:2:4:1:2:1

Clear selection

Female AaBb is crossed to male AAbb. The gamete will be

4 points

Female AB and ab, male AA and bb

Female AB,Ab,aB and ab male-Ab

female AA,bb,AB and ab male-Ab

Female Aa, and Bb male-AA and bb

Clear selection

Incomplete dominance is shown by

4 points

Mirabilis jalapa

snap dragon

Dog flower

all of these

Clear selection

Sickle cell anemia is one of the good example for which of the following

4 points

Qualitative disorder

Quantitative disorder

Chromosomal disorder

none of these

Clear selection

A man with blood group B marries a woman with blood group A and their first child is having group B. what is the genotype of the child

4 points

IAi

IAIB

IBi

IBIB

Clear selection

Skin color inheritance in man is

4 points

Co dominance

Pleotropy

Polygenic inheritance

none of these

Clear selection

Multiple effect of a gene is called

4 points

Polygenic inheritance

Pleotropy

co dominance

Option 4

Clear selection

The chromosome movement during meiosis had been worked out in the year

4 points

1900

1901

1902

1953

Clear selection

experimental verification of the chromosomal theory of inheritance is done by

4 points

Alfred sturtevant

Sutton and boveri

Thomas Hunt Morgan

Mendel

Clear selection

84.Which of the following genotype does not produce any sugar polymer on the surface of the RBC?

4 points

IAIA

IAi

IAIB

Clear selection

Who used the frequency of recombination between gene pair on the same chrosmome is a measure of distance between genes and mapped their position on chrosmome

4 points

Mendel

TH morgan

Alfred sturtevant

Sutton

Clear selection

Point mutation is change which involves:

4 points

loss of a gene

addition of a gene

change in a base pair of gene

deletion of a segment of a gene

Clear selection

The term linkage is coined by

4 points

T H Morgan

Alfred sturtevent

Mendel

sutton

Clear selection

Total number of Autosome in man

4 points

11 pair

44 pair

22 pair

2 pair

Clear selection

In male Y chromosome inherited from

4 points

Mother

maternal mother

paternal mother

paternal father

Clear selection

Sex chromosome of a female bird are represented by

4 points

Clear selection

Henking is associated with

4 points

X Body

antibody

parapodia

Y chromosome

Clear selection

Trisomy of which of the chromosome is involved in Down Syndrome

4 points

Clear selection

Gynaecomastia is common among

4 points

Down's syndrome

Turner's syndrome

Klinfelter's syndrome

Colorblindness

Clear selection

HBA1 and HBA2 are located on chromosome number

4 points

Clear selection

Conditions of karyotype 2n+1 or 2n-1 are called

4 points

Aneuploidy

Polyploidy

Haploidy

Diploidy

Clear selection

PKU is a genetic disorder due to defect in metabolism of the following

4 points

Lipid

Polysacharide

amino acid

neucleic acid

Clear selection

Which of the following is a sex linked recessive disorder

4 points

Colorblindness

Thalassemia

Sickle cell anemia

PKU

Clear selection

The graphical representation to calculate the probability of all possible genotype of offspring in a genetic cross was developed by

4 points

RC Punnet

T H Morgan

Mendel

Boveri

Clear selection

The nuclear structure observed by Henking in 50% of the insect sperm after spermatogenesis was

4 points

X body

Autosome

Y chromosome

Polar body

Clear selection

Physical association of gene on a chromosome is called

4 points

Linkage

Repulsion

polyploidy

aneuplody

Clear selection

Chose the wrong statement

4 points

In grasshoppers, besides autosomes males have only one-X chromosome, whereas females have a pair of X- chromosome

In XY type of sex determination, both males and females have same number of chromosome

In Drosophila, males have one X and One Y chromosome , whereas females have a pair of X chromosome besides Autosomes

In insects with XO type of sex determination, all sperms bear X-chromosme besides autosome.

Clear selection

A person affected with Phenyketonuria, lacks an enzyme that convert the amino acid phenyl alanine into

4 points

Phenyl pyruvic acid

Tyrosine

Alanine

Glycine

Clear selection

In sickle cell anemia, the sequence of aminoacids from the firs to seventh position of the beta chain of Hb S (HbS) is

4 points

His,Leu,Thr,Pro,Glu,Val,Val

Val,His,leu,Thr,Pro,Glu,Glu

Val,His,Leu,Thr,Pro,Val,Glu

Thr,His,Pro,Val,Pro,Val,Glu

Clear selection

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