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Genetics – GK Quiz with Answers – Level 3

Harder genetics GK questions on Mendel's pea crosses, dominant and recessive traits, sex determination, homologous and analogous organs, fossils and why acquired traits are not inherited.

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Questions, answer key and solutions.

Questions
50
Duration
35 min
Marks
50

Negative marking

Attempts
100
Access
Free
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Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 35-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

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Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
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Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 35 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Genetics GK Level 3 Practice Quiz on Heredity, Mendel and Sex Determination

This is Level 3 of the Genetics GK series, a harder Biology set on heredity, variation and evidence of evolution. It covers Mendel's tall and short pea cross, dominant and recessive traits, sex chromosomes and homologous versus analogous organs. Aptitude360 gives a written explanation for every question.

Topics covered in this Genetics Level 3 set

  • Mendel's experiments: contrasting characters in garden peas and the order of steps in the tall and short cross
  • Dominance: why first-generation plants are all tall and how short plants reappear in the next generation
  • Sex determination: human sex chromosomes and egg temperature in some reptiles
  • Evolution evidence: homologous limbs, analogous wings of birds and bats, and fossils
  • Variation: sexual versus asexual reproduction and why acquired traits are not inherited

Heredity concepts to revise

  • A tall pea plant may carry the gene for shortness, but a short plant carries none for tallness
  • The mother always passes an X chromosome, so the father's X or Y decides the child's sex
  • Homologous organs share a basic design; analogous organs share a function
  • Changes in body cells, such as weight loss, do not reach the next generation

Revision tips for Mendel and evolution questions

  • Write the pea cross out step by step to handle sequencing questions
  • Keep a two-column list of homologous and analogous examples, since statements often swap them

Who should take this genetics quiz

General Awareness aspirants who know basic heredity and want tougher statement and matching practice in Biology.

FAQs about Genetics – GK Quiz with Answers – Level 3

What is genetics in biology?
Genetics is the branch of biology that studies heredity and variation, that is, how traits pass from parents to offspring and why offspring differ.
How is the sex of a child determined in humans?
The mother always passes an X chromosome. If the father passes an X the child is a girl (XX), and if he passes a Y the child is a boy (XY).
What is the difference between homologous and analogous organs?
Homologous organs, such as the forelimbs of mammals and birds, share the same basic structure but may do different jobs. Analogous organs, such as the wings of a bird and a bat, do a similar job but differ in design.
Why are acquired traits not inherited?
Acquired traits, such as weight lost through starvation, do not change the DNA of reproductive cells, so they are not passed to the next generation.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Genetics GK Level 35035 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

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