Chromosomes

A centromere and a pair of sister chromatids

Inside the nucleus in eukaryotic cells. In the cytoplasm in prokaryotic cells.

that is the unique of each and every one so that all people have different ' finger print' of genom

Female transmit 23 chromosomes to the offspring. She has that unique chromosome called as X chromosome. This is transmitted to the offspring. From male you get either X or Y chromosome. From XX chromosome you get female child. From XY chromosome you get male child.

according to the chromosome theory of inheritance,genes are carried from parents to their offspring on chromosomes.

In interphase, the DNA has just replicated and exists as loosely coiled chromatins. They have not yet condensed enough to be the form of a chromosome.

In the next stage, prophase, the DNA will shorten and condense into the easily recognizable chromosome structure.

After fertilization all normal human cells contain the same number of chromosomes as the cells of an adult human - 23 pairs of chromosomes, for a total of 46 chromosomes.

Before fertilization the ovum contains only 23 chromosomes. A second 23 chromosomes are provided by the sperm during fertilization.

This occurs due to nondisjunction, in which one or more homologous pairs of chromosomes do not separate during anaphase I, or sister chromatids do not separate properly during anaphase II of meiosis. The resulting daughter cells (gametes) will have either 22 or 24 chromosomes. If the gamete with 22 chromosomes unites with a normal gamete with 23 chromosomes, the offspring will have 45 chromosomes (23 + 22). If the gamete with 24 chromosomes unites with a normal gamete, the offspring will have 47 chromosomes (23 + 24). These are usually lethal conditions.

64 :) {APEX}

Well down syndrome is causes by the 21st chromosome of a sex cell doubling, and so once fertilisation with the egg commences there will be 3 21st chromosomes. When you have 45 their is multiple things that can happen, the only consistent one is Turner Syndrome, which basically stunts puberty. This only happens in females and it is when they have X instead of XX.

how many do a fox have

Mutations that can be passed on to future generations must be present in the gametes. The mutation of heterochromia in which a person has one blue and one brown eyes is present in the chromosome of the mother or father and passed to the offspring.

AnaPhase1

A karyotype is a picture of all the chromosomes in a person's cells. A human has 46 chromosomes in all but sex cells.

Don't listen to that person if you want to know you shall know a shark has 82 chromosomes and I know because of school I am taking a test that tells me how many they have

In late anaphase and G1 of interphase, a chromosome is unreplicated and consists of a single DNA double helix.

A replicated chromosome contains two identical DNA double helices.

Meiotic nondisjunction. In meiosis I or II, chromosome pair 21 fail to separate correctly, leaving one gamete with an extra chromosome 21.

The chromosomes condense in prophase of mitosis. https://en.wikipedia.org/wiki/Mitosis#/media/File:Animal_cell_cycle-en.svg

22

23 Pairs

The cellular component that helps pull apart the chromosome in mitosis and meiosis are the spindle fibers. These spindle fibers are made of micro-tubules.

Gametes are reproductive cells produced by a type of cell division called meiosis. They contain only one set of chromosomes and are said to be haploid.

The sex chromosomes will usually be in the last place on the karyotype (typically the bottom right corner). If/when the karyotype is numbered, the sex chromosomes should be numbered as the 23rd pair.

Autosomal genes are the genes that make up your average chromosomes that contain the basic body features. Such as bone, skin, eyes, and etc. These give a person the basic structure and basic of the development. The sex genes are either X or Y which determine if you are a male or female.