Concepts | Questions | Media Resources |
17.1 Human Life Cycle | 17.1 Human Life Cycle | 17.1 Human Life Cycle |
- The human life cycle involves two types of cell divisions: mitosis and meiosis.
| - The human life cycle involves what two types of cell divisions?
Answer
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17.2 Mitosis | 17.2 Mitosis | 17.2 Mitosis |
- Mitosis, nuclear division in which the chromosomal number remains constant, is involved in growth and repair.
- Cytokinesis divides the cytoplasm and organelles between the daughter cells.
| - Is the number of chromosomes the same for all organisms? How many chromosomes are found in human cells?
Answer
- Following mitosis, how does the chromosome number of the daughter cells compare to the chromosome number of the parental cell?
Answer
- What are the stages of mitosis?
Answer
- How is the cytoplasm divided between the daughter cells following mitosis?
Answer
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17.3 Meiosis | 17.3 Meiosis | 17.3 Meiosis |
- Meiosis, nuclear division in which the chromosomal number is reduced by one-half, is involved in gamete production.
| - What is the function of meiosis?
Answer
- How does the chromosome number of the parental cell before meiosis differ from the chromosome number of the daughter cells?
Answer
- How does meiosis ensure genetic recombination in the daughter cells?
Answer
- What are the stages of meiosis?
Answer
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17.4 Chromosomal Inheritance | 17.4 Chromosomal Inheritance | 17.4 Chromosomal Inheritance |
- Normally, humans inherit 22 pairs of autosomes and one pair of sex chromosomes for a total of 46 chromosomes.
- Normally, males have the sex chromosomes XY and females have the sex chromosomes XX.
- Abnormalities arise when humans inherit abnormal chromosomes or an abnormal number of chromosomes.
| - What process usually causes an individual to have an abnormal number
of chromosomes?
Answer
- What is the specific chromosome abnormality of a person with Down syndrome?
Answer
- What are some other syndromes that result from inheritance of an abnormal chromosome number?
Answer
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