Chromosomes

Chromosomes need to be distributed to the daughter cells so precisely because the daughter cells need the the genetic information in the chromosomes. If a chromosome is missing in one of the daughter cells this could prevent the cell from producing a needed protein to survive or something to that effect.

Nucleus: a map. It codes for different things and is almost like a set of directions.

Ribosome: LEGOs. Ribosomes gather together amino acids and make proteins out of these groups!

Endoplasmic Reticulum: a tunnel. Cars are the "proteins and lipids" and the tunnel is the ER

Golgi Body: LEGOs again! Lets say you made a car, a house, and a tree out of LEGOs. The Golgi would make these three things into a neighbourhood!

Lysosome: a stomach. A lysosome takes in food and breaks it down for the cell.

Vacuole: a closet. It stores random stuff!

Mitochondria: a battery. Provides power for everything else

Chloroplast: a solar panel. It collects light and turns it into energy.

Cytoskeleton: a human skeleton. Holds shape while it carries out life processes

A cell that contains both copies of each chromosome is called a Diploid cell.

An example of aneuploid condition is Down syndrome, is due to three copies of choromosome 21 or trisomy 21.

X Y

The most basic analogy for chromosomes is that they are the the blueprints since they are large bundles of DNA which is the actual information on your body and how it is constructed, and a blueprint is a detailed plan on how something is constructed.

deoxyribonucleic acid

I think it's called Interphase? idk BUT...... it's a question on my homework lol

The chromosomes in a cell's nucleus are only visible during the part of the cell cycle known as prophase. Prophase is the stage of mitosis in which chromatin condensation occurs.

Hi, i think OI answered this one.
there is a species of fern that has a few thousand base pairs.
They believe that number of base pairs in not linked to intelligence or complexity, simply linked to age of evolution (my view on it) so the longer the species has lived and evolved the more basepairs it seems to have.

Hello my name is Tigress and I am 4 years old.

> They carry hereditary information in the genes from parents to off springs.

> They help cell grow, divide, maintain itself by directing synthesis of proteins.

> Control cell metabolism by directing the formating of necessary proteins.

> They undergo crossing over and mutations and thus contribute to the evolution.

> They guide cell differentiation during development.

> The sat chromosomes form nucleoli in daughter cells at nucleoli organization.

maintaining the chromosome number during sexual reproduction

technically the chromosomes copy during interphase right before metaphase I of meiosis I so during Meiosis I the chromosomes are duplicated and not until metaphase II during meiosis II are the sister chromatids separated.

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.