A single piece of DNA coiled and organized along with RNA and proteins found in the cell.
Eukaryotic chromosomes are often linear while prokaryotic chromosomes are usually circular, with individual chromosome sizes varying widely.
Questions tagged [chromosome]
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Why is Chromosome 1 called Chromosome 1?
Chromosome 1 is the designation for the largest human chromosome. Humans have two copies of chromosome 1, as they do with all of the autosomes, which are the non-sex chromosomes. Chromosome 1 spans about 249 million nucleotide base pairs, which are…
fu DL
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Why can plants handle extra chromosomes much better than animals?
Why can plants handle being polyploid way better than animals, where it is almost always fatal?
I found a 2004 paper while searching about this topic, but I'm wondering if there have been any recent discoveries and if scientists are still actively…
Caleb Adams
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Do prokaryotic chromosomes have centromeres?
I found this here.
Eukaryotic chromosomes are always linear. ... In contrast, prokaryotic chromosomes are either completely devoid of centromeres or carry the so-called “plasmid centromeres” which are not essential (with a few exceptions, such as…
a.RR
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Is there any system how genes are spread across chromosomes?
Every chromosome being a wrapped DNA molecule contains thousands or more genes.
Now, is there any system why a gene A goes to a chromosome K and gene B to chromosome J?
J. Doe
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What are the total number of alleles for a single trait?
Humans receive a copy of gene from both parents and each gene has an alternative form called allele. Does every person possess two genes and four alleles for a single trait?
Rabik John
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What is the main difference in chromatin fiber and chromonema?
What I understand is both are coiled version of DNA along with histone but are termed different based on their degree of condensation. My question is when do we call it chromonema and when chromatin fiber? Do we consider 30nm fiber as chromatin and…
Anindya
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Barr body in mitosis
In early embryonic development, some female cells pass through a process called lionization and one of the X chromosomes get condensed and began to be called Barr body.
What I don't understand is how the Barr body behaves during mitosis.…
João Maldonado
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Are the sister chromatids exactly the same?
I'm having doubts about whether the sister chromatids are exactly the same or not. I know that they are the arms that carry the information genes (the alleles), but I don't know if they are exactly the same and / or in what these arms differ, since…
Adoc
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By what mechanism can two chromosomes fuse?
What condition(s) would likely exist which could cause 2 chromosomes in the newly fertilized egg of a placental mammal to fuse? Assume this is more likely than having the same chromosome pair fuse in an individual egg, as well as an individual…
curiousg
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Corrupted chromosome will be in any cell of body if zygote was corrupted?
For example, zygote had abnormal number of chromosome (45, 47, 48 etc) or corrupted chromosome. And fetus was born. Then it means that in any cell of newborn's body there will be the same not normal or corrupted amount of chromosome?
UserKa
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Does A/T, G/C pairing exist in haploid?
I'm trying to understanding base pairing. So every linear chromosome is a double stranded double helix. Is this double stranded property the same as saying an organism is diploid? Or do the chromosomes of a haploid eukaryotic organism, like a member…
chipdash
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about the direct intervention of a child's gender
Can we determine the gender of a child now,I mean,not randomly?
There are equal amount of sperms with X chromosome and Y chromosome.
Can these two kinds of sperms be distinguished easily?
If yes,we can choose the kind of sperm to meet the ovum,then…
questionhang
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Does incomplete dominance follow or not follow the law of segregation?
The law of segregation says that in hetrozygotes, dominant and recessive alleles remain together without mixing into one another. In incomplete dominance, two alleles blend with each other, and the hetrozygote is a new individual with blend of both.…
Rabik John
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what is the difference between gene and allele?
I want to know about gene and allele As we know allele is pair of genes they are ;present on only one chromosome or on homologous chromosomes? Or its like that;one chromosome has only one gene out of an allele and other homologous chromosome has…
Rabik John
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Is MPseq more cost effective than FISH when looking for chromosomal abberations?
There are some papers out there that propose to use MPseq in addition to or instead of FISH when looking for chromosomal aberations in the context of cancer
e.g. this one on infiltrating lobular breast cancer refractory to standard therapy or this…
ilam engl
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