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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 possible gamete combinations are there?

That works out to 2^{23} possible combinations of gametes from one human individual. That’s over 8,000,000 (8 million).

## What are the 4 possible gametes?

There are four possible combinations of gametes for the AaBb parent. Half of the gametes get a dominant A and a dominant B allele; the other half of the gametes get a recessive a and a recessive b allele. Both parents produce 25% each of AB, Ab, aB, and ab.

## How many different combinations of chromosomes are possible among the gametes produced by an individual that has 2N 8?

1. How many different chromosomal combinations can result from meiosis in a species that has a diploid (2N) number of 8? Assume no crossing-over occurs. Sixteen different combinations.

## 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 gamete cells are in a human?

Human cells that contain one set of 23 chromosomes are called gametes, or sex cells; these eggs and sperm are designated n, or haploid. The matched pairs of chromosomes in a diploid organism are called homologous chromosomes.

## How many types of gametes will each parent?

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 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.

## How many possible gamete types can be generated through the process of crossing over alone?

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?

…

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

# nuclear divisions | 1 | 2 |

# daughter cells produced | 2 | 4 |

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

## How many genotypes are possible with 4 alleles?

4 alleles there are 1 + 2 + 3 + 4 = 10 genotypes.

## How many gametes can be formed from Aabbccdd?

One type by AABBCCDD & 16 type by individual Aa Bb Cc Dd 24 = 16.

## What are the possible gametes produced by F1 peas?

The F1 individuals can produce 4 different types of gametes: TG, Tg, tG, tg. The possible phenotypes would be tall and green, tall and yellow, dwarf and green and dwarf and yellow in a 9:3:3:1 ratio. Tall pea plants are dominant to dwarf pea plants and green pod color is dominant to yellow pod color in pea plants.

## How many different combinations are possible in the gametes of an organism whose haploid number is 3?

With three pairs of chromosomes, there are 2^{3} = 8 combinations.

## How many combinations of chromosomes are possible in the gametes in a cell with four pairs of homologous chromosomes?

In a diploid cell with four chromosomes (two homologous pairs), there are two equally possible ways for the chromosomes inherited from the two parents to be arranged during metaphase I. This variation in the orientation of chromosomes leads to gametes with four equally possible combinations of chromosomes.

## 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.