need help
If one strand of DNA, had bases ordered ATCCGTC, what would be the bases of its other strand?
Compare and contrast mitosis and meiosis as to: number of divisions, number of cells produced, number of chromosomes in parent cells and in gametes.
Sure, I can help you with that. Let's start with the first question.
To determine the bases of the other strand of DNA, we need to understand the base pairing rule in DNA. In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). So, based on this rule, we can determine the bases for the other strand.
Given the sequence "ATCCGTC" for one strand, the complementary strand will have the following bases:
T - A
A - T
C - G
C - G
G - C
T - A
So, the bases of the other strand would be "TAGGCAA."
Now, let's move on to the second question about mitosis and meiosis. I will explain the differences between these two processes in terms of the number of divisions, number of cells produced, and number of chromosomes in parent cells and in gametes.
Mitosis:
- Number of Divisions: Mitosis involves one division, commonly referred to as a single division.
- Number of Cells Produced: Mitosis produces two daughter cells, which are genetically identical to each other and to the parent cell.
- Number of Chromosomes: The parent cell in mitosis has a diploid (2n) number of chromosomes, and each daughter cell also has the same diploid number of chromosomes. Diploid refers to cells with two sets of chromosomes, typically found in somatic (non-reproductive) cells.
Meiosis:
- Number of Divisions: Meiosis involves two divisions, known as the first division (meiosis I) and the second division (meiosis II).
- Number of Cells Produced: Meiosis produces four daughter cells, each with half the number of chromosomes as the parent cell. These daughter cells are genetically different from each other and from the parent cell.
- Number of Chromosomes: The parent cell in meiosis has a diploid (2n) number of chromosomes, but after the first division, the resulting cells have a haploid (n) number of chromosomes. Haploid refers to cells with a single set of chromosomes, typically found in gametes (reproductive cells).
In summary, mitosis involves one division, produces two genetically identical daughter cells, and maintains the diploid chromosome number. On the other hand, meiosis involves two divisions, produces four genetically different daughter cells, and reduces the chromosome number from diploid to haploid.