GENERAL INSTRUCTIONS (Please read the following instructions very carefully)
1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
3. Do not refresh or back page.
4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
The two types of sex chromosomes are ______________-
X and Y
Y and Z
A and B
A and X
2
The presence of ________________ chromosome is required for developing into a female.
X
Y
O
Both (A) and (B)
3
According to Notations used by Mendel if tallness is due to a pair of dominant alleles, it is written as __________________ .
tt
TT
Tt
None of these .
4
Alternative forms of the gene are called ______________
Factors
Alleles
Dominant genes
Homozygous genes
5
____________ of the unborn child depends on whether the zygote has XX or XY chromosomes.
Sex
Size
Health
Maturity
6
If we breed a group of mice and remove the tails of these mice by surgery, the progeny would ______________
Be tailless
Not be tailless
May or may not be tailless
7
If the genotype (gene combination) is , then the blood group of the person is ______________________ .
AB
A
8
A person has one of the _________________________ blood groups .
Two
Four
Three
9
Heredity deals with the study of _______________
Resemblances and differences between the parents and offsprings.
Resemblances between the parents and offsprings.
Differences between the parents and offspring.
None of the above.
10
A typical genotypic (hidden) monohybrid ratio is ________________
9 : 3 :3 : 1
1: 2: 1
3:1
9:7
11
Haemophiliac is a hereditary disease carried by __________________
Females and expressed by females
Females and expressed by males
Males and expressed by females
Males and expressed by males
12
Independent assortment of Mendel was proved by __________________________
Monohybrid cross
Dihybrid cross
Incomplete dominance
Black cross
13
Which of the following are correct ?
(a) A person can have one of the four blood groups A, B, AB or O.
(b) The genes and show no dominance over each other, that is, they are co dominant.
Only (a) is correct .
Only (b) is correct .
Both (a) and (b) is correct .
14
Mendel formulated the law of purity of gametes on the basis of _____________
Back cross
Test cross
15
Eye color in the fruit fly is said to be sex-linked. This simple means that the gene for eye colour is ______________________
On the Y chromosome
On an autosome.
On the X and Y chromosomes
On the X chromosome.
16
An allele is said to be dominant if _________________
It is expresed only in heterozygous combination
It is expressed only in homozygous combination
It is expressed in both homozygous and heterozygous condition
It is expressed only in second generation
17
Assertion: The establishment of reproductive isolations in an event of biological significance.
Reason: In the absence or reproductive isolation species can merge back into single population.
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
If both Assertion and Reason are correct , but Reason is not the correct explanation of Assertion
If Assertion is correct but Reason is incorrect
If Assertion is incorrect but Reason is correct
18
If tall height (TT) is a dominant trait and short height is a recessive trait (tt) in the garden pea, then which of the following statement is true?
TT and tt will be tall plants
TT and Tt will be tall plants
TT and tt will be dwarf plants
tt will be tall plants
19
(a) This continuity of traits, which is maintained for all species and passed down to succeeding generations, is called heredity.
(b) The study of the pattern of transmission of characters from parents to their offspring is called Evolution .
(c) The characters are present in the parents and are passed on to the offspring during reproduction.
Only (a) and (b) is correct .
Only (b) and (c) is correct .
Only (a) and (c) is correct .
All of these .
20
(a) The genes and show no dominance over each other, that is, they are co dominant .
(b) If the genotype is , then the blood group of the person is A .
(c) If the genotype is , then the blood group of the person is O.