DNA and Chromosomes
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•
Biology
•
7th Grade - University
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are chromosomes?
Back
Chromosomes are long strands of DNA that contain genes, which are the instructions for making proteins. Humans typically have 46 chromosomes, arranged in 23 pairs.
2.
FLASHCARD QUESTION
Front
What is DNA?
Back
DNA (deoxyribonucleic acid) is the molecule that carries the genetic instructions for life. It is composed of two strands that form a double helix.
3.
FLASHCARD QUESTION
Front
What is a gene?
Back
A gene is a specific segment of DNA that contains the instructions for making a particular protein.
4.
FLASHCARD QUESTION
Front
What are sex chromosomes?
Back
Sex chromosomes are the chromosomes that determine an individual's sex. In humans, they are X and Y chromosomes.
5.
FLASHCARD QUESTION
Front
How many sex chromosomes do females have?
Back
Females typically have two X chromosomes (XX).
6.
FLASHCARD QUESTION
Front
How many sex chromosomes do males have?
Back
Males typically have one X and one Y chromosome (XY).
7.
FLASHCARD QUESTION
Front
What is a mutation?
Back
A mutation is a change in the DNA sequence that can lead to changes in the structure and function of proteins.
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