What Is the Diploid Number?

Humans have a diploid number of 46 chromosomes.
••• people image by charles taylor from Fotolia.com

The diploid number is the number of chromosomes required for two complete copies of the organism’s genome (the entirety of its genetic information). In animals, this is the number of chromosomes in most cells (gametes being an important exception).

Chromosomes

The DNA comprising the genome of a species is organized and packaged into complex structures called chromosomes. Eukaryotes characteristically possess multiple linear chromosomes.

Haploid Number

The number of chromosomes in a complete genome is known as the haploid number. Sexual reproduction involves an alternating process of haploid to diploid back to haploid cells.

Mitosis

Mitosis is the process of cell division that leads to daughter cell having the same number of chromosomes as the parent cell. A diploid parent cell produces two diploid daughter cells.

Meiosis

Meiosis is the process of cell division leading to the production of gametes. A diploid parent cell divides into four haploid daughter cells.

Fertilization

Fertilization of a haploid sperm cell with a haploid ovum produces a diploid zygote (fertilized egg). In humans, the egg and sperm each have a haploid number of 23 chromosomes. When a sperm fertilizes an egg, the resulting diploid zygote has 46 chromosomes (two sets of 23 chromosomes).

Polyploidy

Some eukaryotes possess more than two copies of their genome in their cells. These multiple copies are referred to as polyploidy.

Related Articles

What Are the 4 Characteristics Biologists Use to Recognize...
What Is a Homologous Allele?
What Is the Haploid & Diploid Cell Number for a Monkey?
Advantages & Disadvantages of External Fertilization
Four Major Types of Chromosomes
What Occurs When the Zygote Has One Fewer Chromosome...
What Part of the Plant Makes Seeds?
How Many Chromosomes Are Found in Human Body Cells?
What Is the Role of the Y Chromosome in Sex Determination...
What Is Embryo Cloning?
Three Ways That Genetic Diversity Occurs During Meiosis
What Is a Extra Ring of DNA in Bacteria?
Which Event Will Follow DNA Replication in a Cell Cycle?
Who Invented Cloning & When?
How to Write a Notation of a Karyotype
How Does DNA & RNA Differ?
What Can Happen if Meiosis Goes Wrong?
How Are Photosynthesis & Cellular Respiration Related?
A List of Five Characteristics of Chromosomes
What Is the Order of the Sequence of Events in the...

Dont Go!

We Have More Great Sciencing Articles!