Best answer: Which of the following contains 23 chromosomes?

The secondary oocyte is produced by the reductional division or meiosis I of the primary oocyte. It has 23 chromosomes. Hence, the correct option is C-Secondary oocyte.

Which cells in human has 23 chromosomes?

In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diplod cells. The number of chromosomes in a single set is represented as n, which is also called the haploid number. In humans, n = 23.

Why do we have 23 chromosomes?

46 chromosomes in a human call, arranged in 23 pairs. … This is because our chromosomes exist in matching pairs – with one chromosome of each pair being inherited from each biological parent. Every cell in the human body contains 23 pairs of such chromosomes; our diploid number is therefore 46, our ‘haploid’ number 23.

Does every germ cell contain 23 chromosomes?

Each mature germ cell is haploid, meaning that it has a single set of 23 chromosomes containing half the usual amount of DNA and half the usual number of genes. Except for the egg and the sperm, most cells in the human body contain the entire human genome. Also known as a gamete.

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Which among the following has 46 chromosomes?

List of organisms by chromosome count

Organism (Scientific name) Chromosome number
Arabian coffee (Coffea arabica) 44
Reeves’s muntjac (Muntiacus reevesi) 46
Human (Homo sapiens) 46
Nilgai (Boselaphus tragocamelus) 46

What is metaphase?

Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. … During this stage, the nucleus disappears and the chromosomes appear in the cytoplasm of the cell. During this stage in human cells, the chromosomes then become visible under the microscope.

Which among the following has 23 chromosomes * 1 point spermatogonia zygote secondary oocyte Ogonia?

Spermatogonia are the cells on the inside wall of seminiferous tubules and consist of 46 chromosomes. Oogonia are also diploid and are formed in the fetal ovary. Zygote is also diploid. Secondary oocyte has 23 chormosomes and is formed by meiosis-l of primary oocyte.

What animals have 23 pairs of chromosomes?

Potatoes and Chimpanzees, for example, both have 24 pairs of chromosomes. Humans are not the only animal with 23 pairs, either–the Chinese subspecies of Muntiacusmuntjac, a small kind of deer, also has 23 pairs of chromosomes.

Why do humans have 23 chromosomes and apes 24?

Humans have 23 pairs and apes have 24. The theory is that at some point two ape chromosomes fused to make a single human one. … Chromosomes can break apart and they can fuse together. A part of a chromosome can flip around or a part can move to an entirely different chromosome.

How many chromosomes do germ cell contain?

Each mature germ cell is haploid in that it has a single set of 23 chromosomes containing half the usual amount of DNA and half the usual number of genes.

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How many chromosomes are in an embryo cell?

Each normal embryo contains 46 chromosomes, 23 of which are contributed by the sperm and 23 by the egg. An embryo that contains 46 normal chromosomes is called a euploid embryo . An embryo that has more or less than 46 chromosomes is called an aneuploid embryo .

Where are germ cells found?

Germ cells are cells that create reproductive cells called gametes. Germ cells are located only in the gonads and are called oogonia in females and spermatogonia in males. In females, they are found in the ovaries and in males, in the testes.

What is the chromosome number of a zygote?

During fertilization, gametes from the sperm combine with gametes from the egg to form a zygote. The zygote contains two sets of 23 chromosomes, for the required 46. Most women are 46XX and most men are 46XY, according to the World Health Organization.

How many chromatids are in the second polar body?

Spermatogenesis and Oogenesis Made Simple!

Number of Chromosomes Number of Chromatids Per each Chromosome
Oogonium 46 1 before interphase 2 after interphase
Oocyte I 46 2 (at the end of the growth phase)
Oocyte II / First Polar body 23 2
Ootid / Second Polar body 23 1

What process results in a zygote?

Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote. … This process ultimately leads to the formation of a diploid cell called a zygote. The zygote divides to form a blastocyst and, upon entering the uterus, implants in the endometrium, beginning pregnancy.