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Centromeres

See centromere (singular).


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Centromeres in a resting nucleus

Please take a look at this statement: Centromeres appear as constitutive heterochromatin in a resting nucleus. Is that true? Does that mean that the centromere sequences have no function in non-dividing cells? So, the centromeres must have sequences ...

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by Adz795
Sun Dec 04, 2011 9:55 am
 
Forum: Cell Biology
Topic: Centromeres in a resting nucleus
Replies: 3
Views: 1567

MITOSIS PHASES QUESTION?

... are no longer visible. The spindle apparatus has migrate to opposite poles of the cell.. 3. Metaphase The spindle fibres attach themselves to the centromeres of the chromosomes and align the the chromosomes at the equatorial plate. 4. Anaphase The spindle fibres shorten and the centromere splits, ...

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by HerrBiologie
Sun Oct 30, 2011 9:16 am
 
Forum: Cell Biology
Topic: MITOSIS PHASES QUESTION?
Replies: 2
Views: 3422

tricky F1 cross with specific allele crossover

... carrying the maternal a allele segregated with the paternal B allele. In this meiosis, there was no crossing over between genes A or B and their centromeres. The gametes resulting from this meiosis are expected to be? Ok so what i did as seen in the picture is cross two heterozygotes and during ...

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by vulpes
Tue Oct 04, 2011 4:07 pm
 
Forum: Genetics
Topic: tricky F1 cross with specific allele crossover
Replies: 1
Views: 3610

no repeat sequences in exons of genes?

... about were microsatellites (dispersed everywhere which are short sequences), dna transposons such as SINES and LINES, alpha satellite repeats in centromeres, telomerase repeats at the end of chromosomes, and some others. I know that sometimes LINES can use reverse transcriptase to insert a mRNA ...

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by vulpes
Sun Sep 04, 2011 3:29 pm
 
Forum: Genetics
Topic: no repeat sequences in exons of genes?
Replies: 5
Views: 9655

Re: Meiosis = extreme confusion. Please help!

... division of meiosis: Gamete formation Prophase 2: DNA does not replicate. Metaphase 2: Chromosomes align at the equatorial plate. Anaphase 2: Centromeres divide and sister chromatids migrate separately to each pole. Telophase 2: Cell division is complete. Four haploid daughter cells are obtained. ...

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by kyra13
Mon Aug 01, 2011 7:49 am
 
Forum: Cell Biology
Topic: Meiosis = extreme confusion. Please help!
Replies: 10
Views: 44377
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