The somatic cells of a dog contain 78 chromosomes. Which of these is false?

a) the diploid number is 78
b)the haploid number is 39
c) sperm produced by a dog contains 39 chromosomes
d) a cell in metaphase of mitosis contains 78 chromosomes
e) a cell in metaphase II of meiosis contains 78 chromosomes

i don't think it's a or b, but I'm not sure about the rest. thanks for the help!

To determine which statement is false, let's go through each option:

a) The diploid number is 78.
This statement is true. The diploid number refers to the total number of chromosomes in a somatic cell, so if a dog's somatic cells contain 78 chromosomes, then the diploid number is indeed 78.

b) The haploid number is 39.
This statement is also true. The haploid number refers to the number of chromosomes in a gamete (sex cell), which is half the diploid number. So if the diploid number is 78, the haploid number would be half of that, which is 39.

c) Sperm produced by a dog contains 39 chromosomes.
This statement is true. Sperm is a gamete, and gametes have a haploid number of chromosomes. Since the haploid number for a dog is 39, the sperm produced by a dog would also contain 39 chromosomes.

d) A cell in metaphase of mitosis contains 78 chromosomes.
This statement is true. In mitosis, a type of cell division, the genetic material is duplicated, resulting in each daughter cell receiving the same number of chromosomes as the parent cell. If the parent cell has 78 chromosomes, then the cell in metaphase of mitosis would also have 78 chromosomes.

e) A cell in metaphase II of meiosis contains 78 chromosomes.
This statement is false. Meiosis is a different type of cell division that involves two rounds of chromosome segregation, resulting in the formation of four haploid cells. During meiosis II, the number of chromosomes is already halved from the original diploid number. Thus, a cell in metaphase II of meiosis would contain only 39 chromosomes, not 78.

Therefore, the false statement is option e) "A cell in metaphase II of meiosis contains 78 chromosomes."