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1
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements are correct regarding chromosomal basis of sex determination?

i. The mechanism of sex determination in insect is XX - XO type.

ii. In honey-bee, haplo-diploid type of sex determination is observed.

iii. Human males have homomorphic sex chromosomes.

iv. Human females have heteromorphic sex chromosomes.

v. Chromosomal mechanism of sex determination in birds is ZW-ZZ type.

A

i, ii and v only

B

iii and iv only

C

i, ii and iv only

D

ii, iv and v only

2
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Following table shows ABO blood group in man. Observe carefully and identify 'P', 'Q' and ' R '.

MHT CET (PCB) 2025 9th April Morning Shift Biology - Principles of Inheritance and Variation Question 2 English
A

$\quad \mathrm{P}-\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{A}}, \quad \mathrm{Q}-\mathrm{AB}, \quad \mathrm{R}-$ antibody a

B

$\quad \mathrm{P}-\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{B}}, \quad \mathrm{Q}-\mathrm{NIL}, \quad \mathrm{R}-$ antibody b

C

$\mathrm{P}-\mathrm{I}^{\mathrm{B}} \mathrm{I}^{\mathrm{B}}, \quad \mathrm{Q}-\mathrm{B}, \quad \mathrm{R}-\mathrm{NIL}$

D

$\quad \mathrm{P}-\mathrm{I}^{\mathrm{O}} \mathrm{I}^{\mathrm{A}}, \quad \mathrm{Q}-\mathrm{A}, \quad \mathrm{R}-$ antibody ab

3
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

If you cross two heterozygous plants, how many of the all possible $F_1$ offsprings will also be heterozygous?

A

All

B

Half

C

$3 / 4^{\text {th }}$

D

$1 / 4^{\text {th }}$

4
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Sexually reproduced offsprings tend to differ from their parents. This is known as __________

A

cloning

B

mutation

C

heredity

D

variation

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