For ease, biologists represent 1 set of chromosomes from any organism by the letter n. Any cell with 2 sets is called diploid and represented as 2n. Any cell with just that 1 set (n) is called haploid.
Two cells are isolated from a sexually reproducing organism. One cell contains 92 chromosomes and the other cell contains 46 chromosomes. Which of the following statements is true?
a.The diploid number (2n) of this organism is 46
b.The diploid number (2n) of this organism is 92
c.The cell containing 46 chromosomes is likely a gamete (egg or sperm) cell from the organism
d.The cell containing 46 chromosomes is likely a somatic (body) cell from the organism
e.The cell containing 92 chromosomes is likely a somatic (body) cell from the organism
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To determine the correct statement, let's understand the concepts mentioned in the question:
1. Diploid (2n): A cell with two sets of chromosomes.
2. Haploid (n): A cell with only one set of chromosomes.
3. Gamete: A reproductive cell (sperm or egg) that is haploid.
4. Somatic: A body cell that is diploid.
Given that one cell contains 92 chromosomes and the other cell contains 46 chromosomes, we can deduce the following:
- The cell with 92 chromosomes is diploid (2n) since it contains two sets of chromosomes.
- The cell with 46 chromosomes could be either haploid (n) or diploid (2n).
Now let's analyze the statements:
a. The diploid number (2n) of this organism is 46: This statement cannot be true because we know that one of the cells contains 92 chromosomes.
b. The diploid number (2n) of this organism is 92: This statement is true because the cell with 92 chromosomes is diploid (2n).
c. The cell containing 46 chromosomes is likely a gamete (egg or sperm) cell from the organism: This statement could be true since gametes are usually haploid (n).
d. The cell containing 46 chromosomes is likely a somatic (body) cell from the organism: This statement could also be true since somatic cells are typically diploid (2n).
e. The cell containing 92 chromosomes is likely a somatic (body) cell from the organism: This statement could be true since somatic cells are usually diploid (2n).
Therefore, the correct statement is:
b. The diploid number (2n) of this organism is 92.
To determine the answer, we need to understand the concept of diploid and haploid cells.
In sexually reproducing organisms, cells can exist in two different states: haploid and diploid. Haploid cells contain only one set of chromosomes (n), while diploid cells contain two sets of chromosomes (2n).
In the given scenario, one cell contains 92 chromosomes, and the other cell contains 46 chromosomes.
Now let's analyze the options one by one:
a. The diploid number (2n) of this organism is 46: This statement is incorrect. If the organism has 46 chromosomes in its diploid state, then the haploid (n) state would have 23 chromosomes, not 46.
b. The diploid number (2n) of this organism is 92: This statement is correct. Since one cell contains 92 chromosomes, it is likely in the diploid state (2n), indicating that the organism's diploid number is 92.
c. The cell containing 46 chromosomes is likely a gamete (egg or sperm) cell from the organism: This statement is incorrect. Gamete cells are haploid (n) cells, containing half the number of chromosomes compared to diploid cells. In this case, the cell containing 46 chromosomes is diploid (2n), not haploid (n).
d. The cell containing 46 chromosomes is likely a somatic (body) cell from the organism: This statement is correct. Somatic cells are diploid (2n), containing the full complement of chromosomes. Hence, the cell with 46 chromosomes is likely a somatic cell.
e. The cell containing 92 chromosomes is likely a somatic (body) cell from the organism: This statement is incorrect. If the organism's diploid number is 92, then a cell containing 92 chromosomes would also be diploid, not haploid (n).
Therefore, the correct answer is:
d. The cell containing 46 chromosomes is likely a somatic (body) cell from the organism.