CBSE-CLASS-XII SERIES Biology
Inheritance Of Two Genes
11 previous year questions.
Volume: 11 Ques
Yield: Medium
High-Yield Trend
11
2024 Chapter Questions 11 MCQs
01
PYQ 2024
medium
biology ID: cbse-cla
(a) Draw a diagram of a human sperm. Label any four parts and write their functions.
02
PYQ 2024
medium
biology ID: cbse-cla
(b) Explain the events which occur within a female Anopheles mosquito after it has sucked blood from a malaria patient.
03
PYQ 2024
medium
biology ID: cbse-cla
Study the graph given below that represents the changes in the thickening of the uterine wall in women βXβ and women βYβ over a period of one month: \textit{(Refer to the provided graph.)}
What does the graph with respect to woman βXβ and woman βYβ indicate? Give a suitable reason.
What does the graph with respect to woman βXβ and woman βYβ indicate? Give a suitable reason.
04
PYQ 2024
medium
biology ID: cbse-cla
Consider the given data of a hypothetical small portion of mRNA that codes for a functional polypeptide chain and answer the questions that follow:
mRNA Sequence: 5ββ UCAUUAACCCAGAUCUUCUUAAAAGGA β3β
How many amino acids will be formed from the given codons, if substitution of βUβ by βCβ takes place at the 5th codon? Explain your answer.
mRNA Sequence: 5ββ UCAUUAACCCAGAUCUUCUUAAAAGGA β3β
How many amino acids will be formed from the given codons, if substitution of βUβ by βCβ takes place at the 5th codon? Explain your answer.
05
PYQ 2024
medium
biology ID: cbse-cla
Which of the chromosome in a human possesses the least number of genes?
1
21\textsuperscript{st} chromosome
2
16\textsuperscript{th} chromosome
3
X chromosome
4
Y chromosome
06
PYQ 2024
medium
biology ID: cbse-cla
The question consist of two statements β Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
1
Both (A) and (R) are true and (R) is the correct explanation of (A).
2
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3
(A) is true, but (R) is false.
4
(A) is false, but (R) is true.
Assertion (A): Communities that comprise of more species tend to be more stable.
Reason (R): A higher number of species results in less year-to-year variation in total biomass.
Assertion (A): Communities that comprise of more species tend to be more stable.
Reason (R): A higher number of species results in less year-to-year variation in total biomass.
07
PYQ 2024
medium
biology ID: cbse-cla
The question consist of two statements β Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
1
Both (A) and (R) are true and (R) is the correct explanation of (A).
2
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3
(A) is true, but (R) is false.
4
(A) is false, but (R) is true.
Assertion (A): In birds, the sex of the offspring is determined by males.
Reason (R): Males are homogametic while females are heterogametic.
Assertion (A): In birds, the sex of the offspring is determined by males.
Reason (R): Males are homogametic while females are heterogametic.
08
PYQ 2024
medium
biology ID: cbse-cla
The question consist of two statements β Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
1
Both (A) and (R) are true and (R) is the correct explanation of (A).
2
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3
(A) is true, but (R) is false.
4
(A) is false, but (R) is true.
Assertion (A): In molecular diagnosis, single-stranded DNA or RNA tagged with a radioactive molecule is called a probe.
Reason (R): A probe always searches and hybridises with its complementary DNA in a clone of cells.
Assertion (A): In molecular diagnosis, single-stranded DNA or RNA tagged with a radioactive molecule is called a probe.
Reason (R): A probe always searches and hybridises with its complementary DNA in a clone of cells.
09
PYQ 2024
medium
biology ID: cbse-cla
The question consist of two statements β Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
1
Both (A) and (R) are true and (R) is the correct explanation of (A).
2
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3
(A) is true, but (R) is false.
4
(A) is false, but (R) is true.
Assertion (1): AIDS is a syndrome caused by HIV.
Reason (R): HIV is a virus that damages the immune system with DNA as its genetic material.
Assertion (1): AIDS is a syndrome caused by HIV.
Reason (R): HIV is a virus that damages the immune system with DNA as its genetic material.
10
PYQ 2024
medium
biology ID: cbse-cla
If the sequence of nitrogen bases of the coding strand in a transcription unit is 5 βATGAATGβ3 , the sequence of bases in its RNA transcript would be:
1
5 βAUGAAUGβ3
2
5 βUACUUACβ3
3
5 βCAUUCAUβ3
4
5 βGUAAGUAβ3
11
PYQ 2024
medium
biology ID: cbse-cla
Name the nematode (scientific name) that infects the roots of tobacco plant and reduces its yield.
About Inheritance Of Two Genes - CBSE-CLASS-XII
Inheritance Of Two Genes is a vital chapter for CBSE-CLASS-XII aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
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