compare and contrast the two terminologies
2006-09-25 08:52:22 · 5 answers · asked by bebeto 1 in Science & Mathematics ➔ Biology
Barr bodies are inactivated X chromosomes, usually in a cell, all X chromosomes in it are barred (rendered inactive) except one... thus a XX woman would have one barr body in each cell, an XY male has none, a XXX woman has two, a Klinefelter XXY has two for example.
Holandric genes: Y-linked genes
Sex influenced disorder, not sure but my best guess is they are caused by sex-influenced genes, such as premature balding. The gene is dominant in males, one allele is enough to display the phenotype, but recessive in females (two needed)
btw this is on an autosome
2006-09-25 09:00:02 · answer #1 · answered by kb27787 2 · 0⤊ 0⤋
Heterochromatin is very densely coiled chromatin. Because it is coiled SO densely, it's genetic material can not be used. The Barr body is an excellent example of heterochromatin. The Barr body is the extra X chromosome that females have. It's considered heterochromatin because it's very densely coiled. It's a good thing that it's inactive, because if it wasn't, women would get a double dose of all the X chromosome genes, and that is somehow dangerous. Therefore, the body inactivates the chromosome by a process called Acetylation. This is when you attach acetyl groups to the chromosome. This causes it to become inactive, and it becomes the Barr body. Holandric genes are genes that are carried on and sent from the Y chromosome. Sex-influenced disorders are disorders that are passed on through the sex chromosomes (X and Y).
2006-09-25 10:08:26 · answer #2 · answered by عبد الله (ドラゴン) 5 · 0⤊ 0⤋
Holandric Genes
2016-12-15 15:19:20 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Barr bodies is the inactive x chromosome in women, women have two X chromosomes and one of them is inactive, this one forms the Barr body in women cells.
heterochromatine is condensed chromatine this means that this chromatine is not involve in replication, transcription or translation.
holandric genes are the genes that are Y-linked genes (this means male linked genes)
sex influenced disorders are disorders influenced by X or Y chromosome
2006-09-25 09:02:18 · answer #4 · answered by Anonymous · 0⤊ 0⤋
a barr body is something in females only
females have XX chromosomes, and one is chosen to have the traits modeled after. the other is basically dead and it resides in the barr body
2006-09-25 09:00:49 · answer #5 · answered by burnsielaxplayer 2 · 0⤊ 0⤋