**Contents**show

There are 8,324,608 possible combinations of 23 chromosome pairs. As a result, two gametes virtually never have exactly the same combination of chromosomes. Each chromosome contains dozens to thousands of different genes.

## How do you calculate the number of possible chromosome combinations?

If you know the haploid number for an organism, you can calculate the number of possible combinations in the gametes. The possible combinations are equal to 2^{n}, where n is the haploid number. For the organism in Figure 9-18, n = 2, so the number of chromosome combinations is 2^{2}, or 4.

## How many possible outcomes can humans have in meiosis without crossing over?

Assume no crossing-over occurs. Sixteen different combinations.

## How many combinations are possible when chromosomes assort independently into gametes ignoring crossing over )?

They align and assort independently to form any of 16 different combinations.

## How many different possible combinations of chromosomes might there be in the offspring?

Humans have 23 pairs of chromosomes. That means that one person could produce 2^{23} different gametes. In addition, when you calculate the possible combinations that emerge from the pairing of an egg and a sperm, the result is (2^{23})^{2} possible combinations.

## How many possible gametes can be formed following meiosis excluding crossing over events from an original cell that contains a diploid number of six 2n 6 )?

from an original cell that contains a diploid number of 46 (2n=46)? 3. How many possible gamete types can be generated through the process of crossing over alone? 4.

…

Mitosis (begins with a single cell) | Meiosis (begins with a single cell) | |
---|---|---|

# daughter cells produced | 2 | 4 |

_{#}_{chromosomes}_{in} daughters |
46 | 23 |

## How many DNA combinations are possible?

In a tetranucleotide block where the nucleotides can appear more than once and the order is random, there can be 256 possible combinations. 256 is a large number of possible DNA letters.

## How many possible combinations of chromosomes could this organism produce as a result of independent assortment?

According to the law of independent assortment, there are 2^{n} combinations where chromosomes can assort into different gametes. So where n is the haploid number, you get 2^{23}=8,388,608. There are 8,388,608 possible combinations of chromosomes when assorting into gametes.

## How many different combinations are possible between human maternal and paternal chromosomes?

Exactly two maternal and two paternal chromosomes always move to each of the two poles. The first to move influences all the others. They align and assort independently to form any of 16 different combinations.

## How many possible combinations of maternal chromosomes are possible in a human ovum due to independent assortment during meiosis?

How many possible combinations of maternal chromosomes are possible in a human ovum due to independent assortment during meiosis? 223 = ~ 8 million combinations.

## How many different combinations of chromosomes are possible in the gametes?

There are 8,324,608 possible combinations of 23 chromosome pairs. As a result, two gametes virtually never have exactly the same combination of chromosomes. Each chromosome contains dozens to thousands of different genes.

## How do crossing over and independent assortment lead to so many different possible combinations of genes?

Genetic variation is increased by meiosis

Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase I.

## How many different combinations of chromosomes are possible in the gametes of the fruit fly?

The number of different combinations of chromosomes that are possible in the gametes is 2n, where n is equal to the number of homologous pairs of chromosomes. For the fruit fly with four pairs of chromosomes, the number of possible combinations is 24 = 16.

## How many different combinations of chromosomes can be packaged by in a gamete by an organism with a diploid number of 8 2n 8 )?

The diploid number of chromosomes in a certain animal is 8 (2n = 8). How do the four pairs of homologous chromosomes align and separate during meiosis? They align and assort independently to form any of 16 different combinations.

## What combinations of alleles could result from a crossover?

During crossing over, homologous chromosomes exchange genetic material. This is a form of recombination that increases genetic variability. For example, a cross-over between “BD” and “bd” chromosomes may result in either the “Bd” or “bD” alleles.

## How many different combinations of maternal and paternal chromosomes can be packed in gametes made by an organism with a diploid number of 8 2n 8 )?

How many possible gamete combinations are there for an organism that has a diploid number of 8? 24 = 2 X 2 X 2 x 2 = 16 different combinations. 12. Homologous chromosomes a.