Question 1

could you please describe the difference between an egg cell and a sperm cell in terms of the sex chromosomes that may be present ?

Accepted Answer

Here are ...: Normally, all eggs carry an X-chromosome; half sperms carry X-chromosome and another half, Y-chromosome. A Y-chromosome sperm fertilizes an egg to make a male, and a X-chromosome sperm fertilizes an egg to make a female.

Question 2

what is chromosome 13?

Accepted Answer

Chromosome 13: Chromosome 13 has genes that can be associated w breast cancer, bladder cancer, Hirschsprung’s dz, Schizophrenia,  Wilson’ Dz, some forms of deafness, Retinoblastoma and other conditions. If this is not the info you were interested in then please clarify &amp; re-ask.

Question 3

what is an inactivated x chromosome?

Accepted Answer

Homework question: Wikipedia often contains errors. In a person with two or more X-chromosomes (ordinary woman, Klinefelter man), all but one will lyonize and turn into the inactive Barr body. This happens early in the unborn child, and once the choice is made, each cell descended from that cell will inactivate the same X chromosome. Please read about this in some reliable places as this is basic biology.

Question 4

how many chromosomes should you have?

Accepted Answer

46: May have pieces that are switched aroung causing different phenotypes, either good or bad.

Question 5

which chromosome is colorblindness from?

Accepted Answer

X: The  most common form of color blindness is red-green color blindness. The gene is on the x chromosome, so that is why it is most common to see males with this (and not females).

Question 6

why does chromosome 13 get an extra copy?

Accepted Answer

Noone knows: If you mean the birth defect of trisomy 13, noone really knows why that defect is able to survive until birth.Mccoy out!

Question 7

what are the important parts of chromosomes?

Accepted Answer

Exons mostly: The majority of the dna packed in chromosomes does not encode for specific proteins (introns), but may still have a buffer role for protecting the genetic information included in the exons (genes).

Question 8

how many chromosome defects cause retardation?

Accepted Answer

Hundreds at least: We only know about a few hundred, probably thousands possible as each human is unique as are their choomasome array.

Question 9

what are some common chromosome abnormalities?

Accepted Answer

See below: Turner's syndrome, down's syndrome, trisomy 18 are some of the more commonly diagnosed chromosome problems.

Question 10

how do chromosomes determine a person's gender?

Accepted Answer

Cromosomas: Los cromosomas contienen 22 pares no sexuales (o autosomas, 22 de la madre y 22 del padre), y 2 pares sexuales (el par 23, uno de la madre y uno del padre). La información genética de una mujer es 46 XX, al sólo tener X, hereda una X al hijo. El padre tiene 46 XY, por lo cual la información genética del hombre es la que decide el sexo, al poder heredar cromosoma X o Y (XX=mujer y XY=hombre).

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Chromosomes can be described as

A member asked:

Could you please describe the difference between an egg cell and a sperm cell in terms of the sex chromosomes that may be present ?

A member asked:

What is chromosome 13?

A member asked:

What is an inactivated x chromosome?

A member asked:

How many chromosomes should you have?

A member asked:

Which chromosome is colorblindness from?

A member asked:

Why does chromosome 13 get an extra copy?

A member asked:

What are the important parts of chromosomes?

A member asked:

How many chromosome defects cause retardation?

A member asked:

What are some common chromosome abnormalities?

A member asked:

How do chromosomes determine a person's gender?

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