number of gametes

The centromere is at the end and the chromosome is l-shaped. The shape of the chromosome is specific and constant. The sides of the chromosomes on either side of the centromere are called the arms. The chromosomes are cylindrical structures with one or more constrictions. The centromer..

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..

In this method embryos are generated artificially by somatic cells carrying 2n chromosomes as against embryos normally produced in nature by gametes carrying chromosomes. These embryos are called embryoids . They are grown in large number in a small volume of nutrient medium. ..

. 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..

Ploidy Breeding - An organism, in which number of complete chromosome sets is more than the diploid number is called polyploid. It is usual practice to express the chromosome number of an organism in diploid, symbolically represented by 2n. In all sexually propagated c..

Meiosis becomes significant for the following reasons. It brings about a reduction in the chromosome number from a diploid (2n) condition to a haploid (n) condition. Such a reduction becomes necessary for maintaining the chromosome number. It provides chance for the appearance of new..

Chromosomes are tiny thread-like structures found in the nucleus of a cell. Chromosomes store and transmit the coded information which is responsible for all the life processes of an organism. Hence, chromosomes are commonly described as carriers of heredity. In bacteria, the entire heredit..

(sugarcane) 80 9. Ophioglossum (Adder’s tongue fern) 1262 In some cases, males have one chromosome less than females. In the round worm Coenorhabditis males and females have 11 and 12 chromosomes respectively. In the cockroach Blatta orientalis males and females have 23 and 24 chromosomes res..