Dictionary » X » X chromosome

X chromosome

X chromosome

(Science: genetics) A sex chromosome. In mammals paired in females (XX), in amphibia paired in males. The sex chromosome that is present in both sexes: singly in males and doubly in females; human females normally have two X chromosomes.One of the sex chromosomes found in both sexes. The X chromosome in males can express many dominant sex-linked traits because the shorter opposing Y-chromosome has no homologous genes to challenge the dominance of some genes on the Y chromosome.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Need some help with a question

In the cell cycle, at which stages do two chromatids make up one chromosome? (Can be multiple answers) a. beginning of mitosis b. end of G1 phase c. beginning of S (Synthesis) d. end of mitosis e. beginning of G2 phase

See entire post
by nillkill
Sat Mar 22, 2014 5:49 pm
 
Forum: Cell Biology
Topic: Need some help with a question
Replies: 0
Views: 31

Meiosis prophase I crossover

“Chromosomal crossover (or crossing over) is the exchange of genetic material between homologous chromosomes that results in recombinant chromosomes.” http://en.wikipedia.org/wiki/Chromosomal_crossover Question: Due to the multiple layers of winding, how can parts of the ...

See entire post
by gs99
Fri Mar 07, 2014 9:23 pm
 
Forum: Molecular Biology
Topic: Meiosis prophase I crossover
Replies: 0
Views: 76

Re:

... (C, N) is 70 pm and smaller. That's 20-times less. However, you may be interested in the new one-molecule sequencing methods. And separation of chromosomes by dissection by laser is also nothing new. This is not a problem again. After scanning slices should not be necessary. http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5292236&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F5238710%2F5292053%2F05292236.pdf%3Farnumber%3D5292236 ...

See entire post
by enarees
Wed Feb 26, 2014 6:57 pm
 
Forum: Microbiology
Topic: Slicing frozen chromosomes with lasers and scanning with SEM
Replies: 4
Views: 246

Totipotent Stem Cell From Molecular Components

... I start with the cell membrane or the nucleus and nucleolus(both are very important)? Q2 The pace of DNA replication is 8 2/3 hours for every chromosome and 2097152 of each chromosome in 1 week. Is that just an estimate because I know that it is 8 2/3 hours per replication origin. Q3 Once ...

See entire post
by caters
Sun Feb 02, 2014 10:58 pm
 
Forum: Cell Biology
Topic: Totipotent Stem Cell From Molecular Components
Replies: 0
Views: 572

A question regarding PCR

probably, your microsatellite is part of the chromosome, right? So there will be much more than 7 bp and it will be on both sides. Yes, the polymerase will amplify the chain until the conditions change (i.e. end of amplification step) or until ...

See entire post
by JackBean
Sat Jan 18, 2014 2:36 pm
 
Forum: Molecular Biology
Topic: A question regarding PCR
Replies: 1
Views: 455
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 13,410 times. 
What links here | Related changes | Permanent link