Characteristics of gametes, Biology

Characteristics of Gametes

Following are some general characteristics of gametes:

1. The female gametes are usually laden with food material, the yolk, while the male gametes are without food reserve.

2. The gametes of opposite sexes are generally unequal in size - the ones which are generally larger are the eggs or the female gametes, and the others that are smaller are called the spermatozoa (or sperms) or just the male gametes.

3. The female gametes are generally nonmotile or immobile (cannot move about actively) while the male ones are motile.

4. The sex cells or gametes which fertilize to generate a new individual usually come from different parents (males and females). This provides for the combination of genes from the two parents, and the offspring, due to such chance combinations of genes, may be better equipped (adapted) for life.

5. The gametes generally cannot develop singly. Instead, they must undergo syngamy involving fertilization in which the male and the female gametes fuse together to , form the zygote.

6. The zygote is still a single cell which has to go through a process of cell division and cell differentiation to gradually acquire the adult form and structure.

7. Both the types of gametes possess half the quantity of the genetic material (DNA), i.e. half the number of chromosomes of the parent. This is expressed by saying that the gametes are haploid (n) possessing only one out of each pair of chromosomes of the species, whereas the parents which produced them are diploid (2n).

Posted Date: 2/5/2013 12:55:49 AM | Location : United States







Related Discussions:- Characteristics of gametes, Assignment Help, Ask Question on Characteristics of gametes, Get Answer, Expert's Help, Characteristics of gametes Discussions

Write discussion on Characteristics of gametes
Your posts are moderated
Related Questions
Explain the Disadvantages of tissue punch - There is a loss of keratini-ed tissue and this can lead to a compromised soft tissue barrier in cases where there is deficiency of a

Why is not Mendel's second law always valid for two or more phenotypical traits of an individual? The Mendel's second law, or the law of the independent assortment, is valid fo

Why does the recombination frequency of genes vary with the distance between them in the chromosome? The farther the distance among the loci of two genes in a chromosome the hi

Why is quarrantine a must before introduction of a plant species from a dissimilar country? a) What is meant by apoplast pathway? Why does it occur in cortex and not in endoder

Q. Managing diarrhoea in children? Managing diarrhoea in children is of great concern. The guidelines for the same are as follows: 1. The first objective is to rehydrate the

The Jones family was caught in a fire but escaped. Unfortunately the father and daughter suffered burns. The father had second degree burns on his chest, abdomen, and both arms, an

What are brief descriptions of how you could test hypothesis. or how would you know if your hypothesis is testable?

What are the main cells of which poriferans are made? Sponges have their outer wall covered by flat cells known as pinacocytes and having pores well-delimited by special cells

Sulphur Sulphur is a component of the animo acids methionine, cysteine and cystine; the B-vitamins, thiamin and biotin; as well as a number of the organic compounds. Sulphate,

S n a c k Products Meat snacks such as curls; chips are made from sliced, whole meat and comminuted meat. Extruded snacks are made from meat and non meat ingredients. Extru