Reproduction in Organisms Test - 9

The fusion of male and female gamete during the sexual reproduction led to the formation of Zygote.

The bisexual animals that possess both male and female reproductive organs are hermaphrodites.

Earthworms, sponge, tapeworm and leech, typical examples of bisexual animals.

Gametogenesis refers to the process of formation of two types of gametes-male and female

A haploid parent produces gametes by mitotic division.
At the beginning of the mitosis, the chromosomes wind up. The chromosomes are now two chromatids joined at the centromere. Since the two chromatids are identical to each other, they are called sister chromatids.

The oestrous cycle is the primary reproductive cycle of other species female of non-primates.

In primates like, man, apes and monkey, the cycle is known as menstrual cycle.

Non-primates include mammals like cows, sheep, rats, deer, dogs, tigers etc.

Two gametes (male and female) that look so extremely similar to each other that they cannot be distinguished are known as homogametes or isogametes.

Example: Isogametes of Cladophora

In diploid organisms, s[ecialised cells called meiocytes (also known as gamete mother cell) undergo meiosis.

A meiocyte is a type of cell that differentiates into a gamete through the process of meiosis.

They undergo meiotic division to produce male and female gametes that carry only one set of chromosomes and thus help in maintaining the chromosomal number of the organism.

A meiocyte is a type of cell that differentiates into a gamete through the process of meiosis.

Meiosis is reduction division, so the number of chromosomes would be reduced to half, i.e. if the number of chromosomes in meiocytes is 2n then the number of chromosome in the gamete would be half of it, i.e n.

Since the meiocytes in the given question has 34 chromosomes, in the gamete the chromosome number would be half, i.e 

In flowering plants, the zygote is formed inside the ovule. After fertilisation the sepals, petals and stamens of the flower wither and fall off.

The zygote develops into the embryo and the ovules develop into the seed. The ovary develops into the fruit which develops a thick wall called pericarp.