Humans have 23 pairs of chromosomes. That means that one person could produce 223 different gametes. In addition, when you calculate the possible combinations that emerge from the pairing of an egg and a sperm, the result is (223)2 possible combinations.

## How many possible gametes can be formed by each?

Hints For Biology 101 Exam #4

No. of homologous chromosome pairs (heterozygous genes) | No. of different gametes from each parent |
---|---|

2 (AaBb X AaBb) | 4 (2^{2}) |

3 (AaBbCc X AaBbCc) | 8 (2^{3}) |

4 (AaBbCcDd X AaBbCcDd) | 16 (2^{4}) |

20 pairs of chromosomes | 1,048,576 (2^{20}) |

## How do you find the number of possible gametes?

The number of gametes produced by a specific genotype is calculated by the **formula 2n**, where n= number of heterogeneous alleles present in the genotype. Here, the given genotype consists of two heterogeneous alleles Aa and Bb while CC is homozygous. So, it can produce 22 = 4 types of gametes.

## What is the number of possible gametes that can be formed due to the independent assortment of chromosomes?

Since humans have 46 chromosomes or 23 homologous pairs, what is the number of possible gametes that can be formed due to independent assortment of chromosomes? The number of possible combinations of maternal and paternal chromosomes in the resulting gametes is 223, or **about 8.4 million**.

## 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 different types of gametes are formed from Aabbccdd?

So, it results in the production of 22= **4 types** of gametes. These types of genotypes that are ABC, ABc, AbC, and Abc will be found in the gametes.

## How many phenotypes can be expressed?

There are three common alleles in the ABO system. These alleles segregate and assort into six genotypes, as shown in Table 1. As Table 1 indicates, only **four phenotypes** result from the six possible ABO genotypes.

## How many chromosome combinations are there?

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 many chromosomes does the cell above have?

What is a chromosome? There are **46 chromosomes** in human somatic cells.