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Y chromosome

Y chromosome

(Science: genetics) The small chromosome that is male-determining in most mammal species and found only in the heterogametic sex. Thus in mammals the male has one y chromosome and one x chromosome. One region of the y chromosome, the pseudoautosomal region, is homologous to and pairs with the x chromosome. The primary determinant of male sexual development is found on the unpaired, differentiated segment of the y chromosome. It carries few other genes besides those dictating sperm development and triggering appropriate hormonal output. The sex chromosome that is carried by men; human males normally have one x chromosome and one Y chromosome.One of the sex chromosomes that has the genetic information to produce male offspring, that is accompanied by chromosome X. Some inherited characteristics in offspring (such as hairy ears and colour blindness in men) are believed to be sex linked, I.e. in.


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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

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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 ...

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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 ...

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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 ...

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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 ...

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by JackBean
Sat Jan 18, 2014 2:36 pm
 
Forum: Molecular Biology
Topic: A question regarding PCR
Replies: 1
Views: 455
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