# How many unique gametes could a single human Produce assume that there is no crossing over?

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Humans have 23 pairs of chromosomes. That means that one person could produce 223 different gametes.

## How many possible kinds of gametes are produced when there is no crossing over?

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.

## How many gametes does meiosis produce without crossing over?

Meiosis contains two separate cell divisions, meaning that one parent cell can produce four gametes (eggs in females, sperm in males). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.

## How many variant gametes in meiosis of a single cell can be produced if we allow for crossing over on the longer of the two chromosomes how many variants could be produced over time by a population of these cells undergoing meiosis and then fertilization?

Human diploid cells have 23 pairs of chromosomes. Because of independent assortment during meiosis I, there are 223, or 8.4 million possible gametes that may be created even if crossing over didn’t occur.

## What gametes can be produced by AA?

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 happens if there is no crossover?

Without crossing over, each chromosome would be either maternal or paternal, greatly reducing the number of possible genetic combinations, which would greatly reduce the amount of genetic variation between related individuals and within a species.

## When two gametes unite they create a?

The process in which two gametes unite is called fertilization . The fertilized cell that results is referred to as a zygote . A zygote is a diploid (or 2N ) cell, which means it contains two copies of each chromosome.

## Why is meiosis II needed for gamete egg and sperm production?

Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. … Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.

## How many zygotes do humans have?

It is a unicellular embryo.”9 (Emphasis added.) The fusion of the sperm (with 23 chromosomes) and the oocyte (with 23 chromosomes) at fertilization results in a live human being, a single-cell human zygote, with 46 chromosomesóthe number of chromosomes characteristic of an individual member of the human species.

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## How many humans are possible?

There are 7 billion humans, so we know that some 420 billion different variants are possible.