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Emiliano Torp

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What is a chromosome

A chromosome is a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order. It is also known as tightly wound DNA. It is a structure that DNA wraps around.

MORE INFORMATION:

A chromosome is an organized structure of DNA and protein that is found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions.

Chromosomes vary widely between different organisms. The DNA molecule may be circular or linear, and can be composed of 10,000 to 1,000,000,000 nucleotides in a long chain.

Cells may contain more than one type of chromosome; for example, mitochondria in most eukaryotes and chloroplasts in plants have their own small chromosomes.

Chromosomes are the essential unit for cellular division and must be replicated, divided, and passed successfully to their daughter cells so as to ensure the genetic diversity and survival of their progeny.

Chromosomal recombination plays a vital role in genetic diversity. If these structures are manipulated incorrectly, through processes known as chromosomal instability and translocation, the cell may undergo mitotic catastrophe and die, or it may aberrantly evade apoptosis leading to the progression of cancer.

In practice "chromosome" is a rather loosely defined term. In prokaryotes and viruses, the term genophore is more appropriate when no chromatin is present. However, a large body of work uses the term chromosome regardless of chromatin content. The simplest genophores are found in viruses: these DNA or RNA molecules are short linear or circular genophores that often lack structural proteins.

Chromosomal DNA encodes most or all of an organism's genetic information; some species also contain plasmids or other extrachromosomal genetic elements.
Structure in nucleus made of DNA and protein. Sections of a chromosomes are genes.
structure in a cell's nucleuse thaat contians genetic material
A chromeosome is organized structure of DNA and protein that is found in cells.
coiled strands of genetic material
coiled strands of genetic material

What is an allele

a form of a gene apex

How are mitosis and meiosis similar

they both produce new cells(apex)

they both have prophase and metaphase (anaphase)

They both involve duplicating chromosomes.

they both have simular steps.

Why did Mendel use pea plants in his experiments

They Self-fertilize. -Apex

What happens during interphase

the chromosomes are duplicated.

What is produced by meiosis

Reproductive cells-- egg or sperm cells--or produced by meiosis.

How are tumor cells different from normal cells

Mitosis is not regulated in tumor cells. This can cause the rapid proliferation of a large number of non-functional cells, whose only actions are to divide into more cells.

Tumor cells multiply too quickly.

What evidence did Mendel find that supported his law of independent assortment

One trait does not affect whether another trait will be passed on. -Apex

Why did Mendel study such a large sample of pea plants to determine the probability of inheritance

The more samples you use, the closer your results will match probability.

How many recessive alleles must a person have to have albinism

2

How many chromosomes will a gamete of this organism have

20

What was the purpose of Mendel's experiments with dihybrid crosses

He wanted to determine if traits affected each other, and concluded (based on his observations) that they did not.

+ To find out if traits could affect the inheritance of other traits.

to determine if traits affected each other

What are non mendelian trait

A trait with four alleles

What is true about the person labeled A

To answer that question, you have to include a picture of the person labeled A.

Which best describes probability

the likelihood that something will happen

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