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Questions and Answers
Which type of chromosomes determine gender in mammals?
Which type of chromosomes determine gender in mammals?
- Autosomes
- XY (correct)
- XX
- Homologous chromosomes
How many pairs of chromosomes are there in human body cells?
How many pairs of chromosomes are there in human body cells?
- 46
- 23 (correct)
- 22
- 44
What is the term for chromosomes that have the same length of DNA and code for the same proteins?
What is the term for chromosomes that have the same length of DNA and code for the same proteins?
- Homologous chromosomes (correct)
- Autosomes
- Diploid chromosomes
- Sex chromosomes
What is the diploid number of chromosomes in human cells?
What is the diploid number of chromosomes in human cells?
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What does the term 'diploid' refer to?
What does the term 'diploid' refer to?
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Study Notes
Chromosomes and Gender
- Sex chromosomes (X and Y) determine gender in mammals.
- Females have XX sex chromosomes, while males have XY sex chromosomes.
Human Chromosomes
- There are 23 pairs of chromosomes in human body cells.
- This means that each human body cell has a total of 46 chromosomes.
Homologous Chromosomes
- Homologous chromosomes are chromosomes that have the same length of DNA and code for the same proteins.
- They are paired together, one inherited from each parent, and have the same genes in the same order.
Diploid Number
- The diploid number of chromosomes in human cells is 46.
- This is the number of chromosomes in a non-reproductive cell (somatic cell).
Diploid Definition
- The term 'diploid' refers to a cell that has two sets of chromosomes, one inherited from each parent.
- Diploid cells have a full complement of chromosomes, which is 46 in humans.
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