Search found 19 matches

by Nelsson
Sun Feb 28, 2010 1:49 pm
Forum: Genetics
Topic: Breeding Value
Replies: 0
Views: 961

Breeding Value

Hi! I've looked up the definition of breeding value, and it states: " the sum of gene effects of a breeding animal as measured by the performance of its progeny". I'm a bit confused. What does the breeding value tell us? What does a high breeding value vs a low breeding value tell us about...
by Nelsson
Mon Mar 30, 2009 1:52 pm
Forum: Molecular Biology
Topic: qPCR
Replies: 1
Views: 3244

qPCR

Hi! I'm trying to understand the mechanism of qPCR and how the results are interpreted. In qPCR a dye is used, which binds to dsDNA, and then the machine measures the fluorescense. The fluorescense is plotted against cycle number and the resulting graph shows which of the tests that contained a high...
by Nelsson
Tue Dec 16, 2008 12:48 pm
Forum: Physiology
Topic: Exam
Replies: 0
Views: 4973

Exam

SInce I have my zoo physiology exam coming up in just a few days, have I been reviewing some of the old exams in the course. However, I'm unable to answer some of them, and I can't find any answers in my textbook: "Biology 7.th ed. - Campbell & Reece". Perhaps these issues no longer ar...
by Nelsson
Thu Aug 28, 2008 9:40 am
Forum: Botany Discussion
Topic: Hydrenchyma
Replies: 2
Views: 7431

Hydrenchyma

Hi! I've studied a cross section(40X) of a Nymphaea leaf and were supposed to locate hydrenchyma. I know that hydrenchyma is water storing parenchyma cells, which makes sense since Nymphaea is a water lily of some sort. however, all the anatomical features I was able to identify were spongy and pali...
by Nelsson
Mon Jun 23, 2008 5:36 pm
Forum: Botany Discussion
Topic: Carex
Replies: 1
Views: 3362

Carex

Hi! does anyone who know of a website with good pictures of different Carex species? or anyone who has any and is willing to share? :) I'm trying to make a picture collection of Carex for my exam, and I'm unavailable to go out and find them all myself. Thanks :)
by Nelsson
Mon May 26, 2008 7:22 pm
Forum: Cell Biology
Topic: Plasmodesmata
Replies: 1
Views: 2973

Plasmodesmata

What's the difference between plasmodesmata in plant cell and gap junctions in animal cell?
is it a structural or functional difference? or both?

Thanks=)
by Nelsson
Mon May 26, 2008 4:24 pm
Forum: Molecular Biology
Topic: Genes
Replies: 1
Views: 1436

Genes

Hi! I usely read about genes located on a specific chromosome code for a specific protein. genes code for, among other things, for polypeptids, and most proteins consist of more than one polypeptid. is it more correct to say that several genes code for one protein, that consist of more than one poly...
by Nelsson
Fri May 09, 2008 7:10 pm
Forum: Cell Biology
Topic: Cytoplasm
Replies: 4
Views: 6757

Cytoplasm

Hi! what exactly is the difference between cytoplasm and cytosol?
by Nelsson
Wed Apr 30, 2008 6:36 pm
Forum: Zoology Discussion
Topic: Hawk & Falcon
Replies: 0
Views: 3130

Hawk & Falcon

Hey! I'm currently studying a number of different birds. These birds are all in a display case, which makes it impossible to view similarities and differences regarding their wing size and shape. Itherefore experience some problems with how to separate a small hawk, like for instance a sparrowhawk( ...
by Nelsson
Wed Apr 23, 2008 12:56 pm
Forum: Genetics
Topic: X chromosome inactivation
Replies: 5
Views: 9421

X chromosome inactivation

Hi! when a X chromosome inactivates in a female fetus, creating a Barr body, this happens independently and random. The random selection of which of the X chromosomes( maternal and paternal) to be inactivated in each cell, results in a female "mosaic", where the genes in the paternal X chr...
by Nelsson
Sun Apr 20, 2008 7:50 pm
Forum: Human Biology
Topic: Wound
Replies: 2
Views: 2439

Wound

Hi! can someone please explain to me how healing of a wound occurs? what biological/cellular processes are involved?

Thanks:)
by Nelsson
Sun Apr 20, 2008 10:55 am
Forum: Cell Biology
Topic: Scars
Replies: 2
Views: 2947

Scars

how come, when you get a scar, the scar turns all white and no hair growth occurs anymore? What are the cellular reasons for this?

thanks:)