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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] straightforward initial-understanding
How many pairs of chromosomes are present in a typical human cell? How many of these pairs are sex chromosomes?
Generated by claude-sonnet-4-6 · 2026-06-26 01:02 · grounding rag
Model Answer

A typical human cell has 23 pairs of chromosomes (46 total). Of these, 1 pair consists of sex chromosomes (XX in females, XY in males).

Explanation

The passage states humans have 22 pairs of autosomes plus one pair of sex chromosomes, totalling 23 pairs. Examiners expect both numbers clearly stated. This is a common 1-mark question — one crisp sentence suffices.

Source: Chapter 8, Section 8.2.4 Sex Determination

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.