In mitosis, if a cell has 4 chromosomes in prophase, how many chromosomes will this cell have in metaphase?

a. 64 b. 32 c. 16 d. 8 e. 4

If a cell has 20 chromosomes in G1, how many chromatids will be present during prophase?
a. 30 b. 20 c. 5 d. 40

Which of the following statements is incorrect about homologous chromosomes?
a. Homologous chromosomes are similar but not identical
b. Homologous chromosomes have the same size and function
c. Homologous chromosomes contain genes for the same kind of protein products
d. Homologous chromosomes cannot be duplicated

When a human cell undergoes meiosis, the resulting daughter cells
a. Are diploid
b. Have identical genes
c. Differ in their genetic combinations
d. Have genes identical to the parental cells

Fertilization of a sperm and an egg results in the formation of a _________
a. Diploid cell
b. Zygote
c. Cell with a new genetic combination
d. All of the above
e. Both a and b

During crossing over in meiosis I, homologous chromosomes
a. Separate and migrate toward opposite ends
b. Exchange segments of DNA
c. Condense and separate
d. Line up at the metaphase plate

Which of the following cells contains two sets of chromosomes (i.e. diploid cell)?
a. Zygote b. Gamete c. Sperm cell d. Egg cell e. Spermatid

Please Help!

My guessing on these answers on these questions that im not sure of that i posted is, 1. d 2. b 3. a 4. a 5. c 6. a

In mitosis, the number of chromosomes remains the same throughout the process. So, if a cell has 4 chromosomes in prophase, it will also have 4 chromosomes in metaphase. Therefore, the answer is e. 4.

During prophase of mitosis, the chromosomes condense and become visible. Each chromosome consists of two identical sister chromatids held together by a centromere. So, if a cell has 20 chromosomes in G1, it will have 20 chromatids in prophase. Therefore, the answer is b. 20.

Homologous chromosomes are pairs of chromosomes that have the same size, shape, and contain genes for the same kind of protein products. However, they are not identical because they may have different versions of those genes. Therefore, the correct answer is b. Homologous chromosomes have the same size and function.

When a human cell undergoes meiosis, the resulting daughter cells are haploid. This means they have half the number of chromosomes compared to the parent cell. Additionally, during meiosis, the process of genetic recombination called crossing over occurs, which leads to the daughter cells having different genetic combinations. Therefore, the correct answer is c. Differ in their genetic combinations.

Fertilization of a sperm and an egg results in the formation of a diploid cell called a zygote. The zygote contains two sets of chromosomes, one set from the sperm and one set from the egg, thus providing a new genetic combination. Therefore, the correct answer is d. All of the above.

During crossing over in meiosis I, homologous chromosomes exchange segments of DNA. This genetic exchange occurs between corresponding segments of the homologous chromosomes, leading to genetic variation in the resulting daughter cells. Therefore, the answer is b. Exchange segments of DNA.

A diploid cell contains two sets of chromosomes, one set from each parent. Among the given options, the only cell that contains two sets of chromosomes is a zygote, which is formed by the fusion of a sperm and an egg. Therefore, the answer is a. Zygote.

I hope this helps! Let me know if you have any further questions.

In mitosis, the cell goes through several stages, including prophase and metaphase. Let's go through the steps to determine the answers to your questions.

1. In prophase, the chromosomes become visible and condense. You mentioned that the cell has 4 chromosomes in prophase.

Therefore, the cell will still have 4 chromosomes in metaphase.

So the answer to the first question is e. 4.

2. In G1, the cell prepares for DNA replication. After DNA replication, each chromosome consists of two identical sister chromatids joined by a centromere.

Since the cell has 20 chromosomes in G1, and each chromosome consists of two chromatids during prophase, the total number of chromatids will be 20 x 2 = 40.

So the answer to the second question is d. 40.

3. Now let's move on to the next question about homologous chromosomes.

a. Homologous chromosomes are similar but not identical - This statement is correct. Homologous chromosomes have similar genes but may have different alleles.

b. Homologous chromosomes have the same size and function - This statement is incorrect. Homologous chromosomes have similar genes but may have different sizes and functions.

c. Homologous chromosomes contain genes for the same kind of protein products - This statement is correct. Homologous chromosomes contain genes for the same kind of protein products but may have different versions of those genes.

d. Homologous chromosomes cannot be duplicated - This statement is incorrect. Homologous chromosomes can be duplicated during DNA replication.

So the answer to the third question is b. Homologous chromosomes have the same size and function.

4. Now let's move on to the next question about meiosis.

During meiosis, a cell goes through two rounds of division to produce four daughter cells. These daughter cells are haploid, meaning they have half the number of chromosomes as the parent cell.

Therefore, the resulting daughter cells differ in their genetic combinations.

So the answer to the fourth question is c. Differ in their genetic combinations.

5. Next, let's move on to the question about fertilization.

Fertilization is the fusion of a sperm and an egg, resulting in the formation of a zygote. A zygote is the initial cell formed when the genetic material from the sperm combines with that of the egg.

Therefore, the answer to the fifth question is b. Zygote.

6. Finally, let's address the question about crossing over in meiosis I.

During crossing over in meiosis I, homologous chromosomes exchange segments of DNA. This process increases genetic diversity by shuffling genetic material between homologous chromosomes.

So the answer to the sixth question is b. Exchange segments of DNA.

7. Lastly, let's determine the cell that contains two sets of chromosomes (diploid cell).

A diploid cell contains two sets of chromosomes, one set from each parent. Among the options given, the zygote is the cell that contains two sets of chromosomes because it is formed by the fusion of a sperm and an egg.

So the answer to the final question is a. Zygote.

I hope this helps! Let me know if you have any further questions.