Heredity
Haryana Board · Class 10 · Science
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What term describes traits that are expressed when present in an organism's genetic makeup?
In human sex determination, what chromosome combination determines a female?
Who is credited with developing the fundamental laws of genetic inheritance?
What process maximizes variations during reproduction?
Sample Questions
In Mendel's pea plant experiments, what happened in the first generation (F1) when crossing tall and short plants?
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All plants were tall
In the F1 generation, only the dominant trait (tallness) was expressed.
What determines the sex of a child in human beings?
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Father's chromosomes
The father's X or Y chromosome determines the child's sex - X for female, Y for male.
What is a gene?
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A section of DNA providing protein information
A gene is a specific segment of DNA that contains instructions for making a particular protein.
How many chromosome pairs do humans typically have?
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22 pairs
Humans have 22 paired chromosomes plus the sex chromosomes, totaling 22 pairs of autosomes.
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