four gametes

A sperm is a haploid male gamete which fuses with the ovum to form the diploid zygot..

The idea of independent assortment can be explained as follows: 1. Let us think of two pairs of contrasting characters represented by the alleles R and r, Y and y. There are two ways by which the two homologous chromosomes segregate during metaphase I of first meiosis. This in turn leads to an inde..

Meiosis - Meiosis is a cell division occurs in reproductive cells (gametes). The male gamete is known as the sperm in animals and the female gamete is known as the ovum (egg). These gametes, after they are formed, have no future unless they unite to form a zy..

Meiosis - This type of cell division occurs in reproductive cells (gametes). The male gamete is known as the sperm in animals and the female gamete is known as the ovum (egg). These gametes, after they are formed, have no future unless they unite to form a zy..

. On the chromosomes are present the genes that give the chromosomes a beaded appearance. The chromosomes are present in pairs. If one chromosome is taken from each pair it forms a haploid set. The full complement of chromosomes is called a diploid set. All the genes together have all the informati..

. On the chromosomes are present the genes that give the chromosomes a beaded appearance. The chromosomes are present in pairs. If one chromosome is taken from each pair it forms a haploid set. The full complement of chromosomes is called a diploid set. All the genes together have all the informati..

They are mutation involving change in number or structure of chromosomes. Change in number of chromosomes induced by mutagens can lead to aberrant gametes, which when fuse with normal gamete lead to aneuploid zygotes. Changes in chromosomal structure by mutation are brought abo..

is the male reproductive part of the flower. The individual units of androecium are called the stamens . Each stamen has a thread-like filament at the free end of which is attached the four-lobed anther . The anther has four pollen-sacs, one in each lobe. The pollen-sacs..

. However, it is also seen in lower organisms like the bacteria, Spirogyra (an alga) and Paramoecium (a protozoan). Bacteria show a primitive type of sexual reproduction called genetic recombination. Sexual reproduction involves the fusion of male gamete with the female gamete i..

It is a type of cell division that occurs only in the reproductive cells and hence it is known as germ cell division. The daughter cells resulting from meiosis will carry half the number of chromosomes and half the amount of genetic material compared to the parent cell. Hence, meiosis is also known..