# Science

posted by .

My original question: In a diploid organism with 2n=8, what is the probability that one of its gametes will contain only paternally derived chromosomes (ie, not a mixture of paternal and maternally derived chromosomes)?

PsyDAG replied: Since 4 of the 8 are paternal,

4/8 * 3/7 * 2/6 * 1/5 = ?

My question: can you explain how he/she got these numbers?

• Science -

I assume that, if 2n = 8, there are 4 paternal and 4 maternal chromosomes.

The first paternal chromosome will be 4/8, and without replacement, the second will be 3/7, the third, 2/6 and the fourth, 1/5.

The second is 3/7, because only 3 paternal chromosomes are left of the remaining 7.

The progression continues.

I hope this helps you understand the process.

• Science -

Thank you very much, I don't remember learning it like this but this certainly does help alot and this makes it easier to understand. Once again, thank you

## Similar Questions

1. ### genetics

Suppose that for an organism, 2N = 8. How many chromosomes do the organism's gametes contain?
2. ### biology

Suppose that for an organism, 2n=8. How many chromosomes do the organism's gametes contain?
3. ### Science

A biologist is studying the epithelial cells in a variety of plants and animals. She counts the chromosomes in the epithelial cells of several organisms and finds the following numbers: Organism A: 32 chromosomes Organism B: 26 chromosomes …

I've got to describe homologeous chromosomes in terms of the type and # of genes that they possess. How would I describe that?
5. ### Science

In a diploid organism with 2n=8, what is the probability that one of its gametes will contain only paternally derived chromosomes (ie, not a mixture of paternal and maternally derived chromosomes)?
6. ### Biology

If a diploid organism has 4 chromosomes, how many pairs of homologous chromosomes would you expect to see during early prophase I?
7. ### 11Science

A diploid organism has five pairs of chromosomes in each somatic cell. Assuming that no crossing over occurs, how many genetically distinct gametes can this organism produce?
8. ### science

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

Im stumped... These answers I cannot find, please and thank you :) 1) In males, the primary target of FSH is the ______. 2)Testosterone and other androgens are secreted by the______. 3)During meiosis, when synapsis occurs, corresponding …
10. ### Biology

The creation of sex cells occurs in meiosis. Explain what happens when a new organism is created and life begins. Answer: meiosis is a process of cell division that produces sex cells, or gametes. Gametes are reproductive cells such …

More Similar Questions