Practice: Haploid v. Diploid

1. A Karyotype is a diagram that shows ___.

• the number and visual appearance of chromosomes in a cell.

• The process plants use to synthesize foods from carbon dioxide, water, and sunlight.

• The results of meiosis.

• How babies are made.

2. How many autosomes are in this human karyotype? How many sex chromosomes?

• 22 pairs of autosomes, 1 pair of sex chromosomes

• 46 pairs of autosomes, 1 pair of sex chromosomes

• 23 pairs of autosomes, 23 pairs of sex chromosomes

• 20 pairs of autosomes, 3 pairs of sex chromosomes

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3. Is this organism male or female?

• Male because the sex chromosomes are the same XX

• Female because the sex chromosomes are the same XX

• Male because the sex chromosomes are different XY

• Female because the sex chromosomes are different XY

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4. Is this karyotype from a diploid or haploid cell?

• Diploid because there are two of each chromosome

• Haploid because there are two of each chromosome

• Diploid because there is one of each chromosome

• Haploid because there is one of each chromosome

5. What type of cells would have this amount of chromosomes in them?

• Somatic (body) cells

• Gametes (Sex cells)

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6. Is this a picture of chromosomes before or after DNA replication?

• Before, the chromosomes are grouped by homologous pairs.

• After, the chromosomes are grouped with their sister chromatids.

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7. What would this karyotype look like after meiosis?

• Exactly the same, two of each chromosome (2n)

• Only one of each chromosomes (n)

• Four of each chromosome (4n)

• 3 of each chromosomes. (3n)

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8. How did this organism get these chromosomes?

• One of each chromosome from mom, one of each from dad.

• Autosomes from mom, sex chromosomes from dad

• Pairs 1-12 from mom, pairs 13-23 from dad

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9. Karyotypes can show you all of the following EXCEPT

• Number of chromosomes

• Biological sex

• Chromosomal abnormalities

• DNA sequence

11. The number of chromosomes during meiosis is incredibly important. Why is that?

• Without meiosis, offspring would have twice the number of chromosomes as their parents.

• Without meiosis, offspring would have half the number of chromosomes as their parents.