498 Answered Questions for the topic genetics

Genetics

04/03/19

What makes a gene dominant or recessive?

We all carry two copies of each gene (outside of male sex chromosomes). If the two differ from each other often one is dominant and one recessive. How does this mechanism work on a molecular level?... more

04/02/19

How is eye color in humans inherited?

In high school we studied the inheritance of eye color, as it was explained to us in the most simple way: blue eye color is a recessive, monogenic, autosomal trait. Now I know that it is a bit more... more

Are mutations a source of genetic variation?

Here is a question from the book *SAT II Success Biology E/M* (where the SAT is the exam taken by the American high school students): > Which of the following statements is true about... more

Are we able to determine the full genotype for the dominant trait?

Are we able to determine the full genotype for the dominant trait?
Genetics Biology Botany

03/28/19

Home Questions Tags Users Unanswered How possible would it be for a tomatillo to cross-pollinate with a peruvian groundcherry?

I am high school student who is developing his final school project, I've decided to work on plant hybrids. I have researched some media and I have found that Tomatillo (Physalys philadelphica) and... more

03/27/19

Origin, or source, of rhesus negative in human blood?

This is my first post here, so please be gentle. I recently learned that I have Rh- blood (I'm A-), and was idly looking into blood types on Wikipedia. I was surprised to find that relatively few... more
Genetics Homework

03/27/19

How to calculate the percentage of heterozygous cells based on a gene map?

I've encountered the following question and am quite stumped by it.A female with genotype AABBCC has been hybridized with a male that has the genotype aabbcc. The first generation (F1) has been... more

What is the functional and structural distinction between core (H2A, H2B, H3,H4) and linker(H1/H5) histones?

Many explanations of histone biochemistry isn't quite elucidating for the undergraduate student. How does histone structure (dimers, octomers) relate to their specific functions as core or linker... more
Genetics Human Biology

03/27/19

What makes a cancer contagious?

Most human cancers are not (very?) contagious (perhaps besides a couple of incidents). But the Tasmanian devil seems to have a form of cancer which is contagious. Now what makes the difference... more

03/27/19

Can any species be bred selectively/engineered to become as diverse looking as dogs?

I've done some research and it appears that dogs are the most diverse looking single species of mammals. The questions that interest me is - are dogs special in respect to genes/gene activation... more

03/27/19

Origin, or source, of rhesus negative in human blood?

I recently learned that I have Rh- blood (I'm A-), and was idly looking into blood types on Wikipedia. I was surprised to find that relatively few (~15% of all) humans have it, and most of those... more
Genetics Human Biology

03/27/19

Athletes: nature vs. nurture?

Having watched a lot of olympians the last few weeks, I was struck by how many of them have actually spent their wholes lives/careers training for their one event (be in running a marathon, or... more

03/26/19

Why was it so hard to decode the corn genome?

My teachers growing up told me it was impossible to decode the maize genome. But yet its been done. Why was decoding the genome so significant, and what made it so difficult?

Do men and women have the same number of genes?

As far as I know, humans have 23 pairs of chromosomes, each one which contains a particular amount of genes. But in the "last" pair, men have a XY pair chromosome, and women have a XX pair... more
Genetics Environment

03/19/19

Have any genetically altered organisms actually become abundant in a natural environment?

Most of the things that come up in Google and Google Scholar for this question have a mostly/completely speculative tone, or at best use models instead of measurements. [This... more
Genetics Bioinformatics

03/19/19

What does phasing mean?

What does phasing mean in genetics/informatics? I've heard that a phased file is a file that has genes separated by chromosome, but can someone give a concrete definition of what phasing actually... more
Genetics

03/19/19

Do we get 1/4 of our genes from each grandparent?

I know that we get half of our genes from each parent, but does it necessarily mean we get 1/4 of our genes from each grandparent? Or is it possible that we might get say 30% from one grandparent,... more

How does Cro protein expressed by lambda phage kill its host?

I read that the DNA segment of lambda phage integrated in host DNA could switch between lysogenic state where cI represses the expression of *Cro* and lytic state where *Cro* expression takes over... more
Genetics Biology

03/18/19

What is meant by biogenetic law?

03/15/19

Is it possible to genetically modify a plant at home?

Would I be able to genetically modify a plant at home? What equipment will be necessary? I think it might be a fun change from the 'norm' of regular hybridisation, to try some inter-family gene... more

03/15/19

Knockout and knockdown of gene?

Out of curiosity, I got this question whether knocking out (deletion) of a gene on one side and knocking down (RNAi) of the same gene on the other side will affect the cell in a similar manner or... more

03/15/19

Are all functions of a human cell known?

Please bear with me as I'm intruding into your world from a computer science background. In programming, once you have created a program, you know all functions of that program. Thus, 100%... more

03/15/19

How is it possible for monosomies to occur?

I was taught in biology class that a cell dies if it doesn't have at least one copy of a chromosome "type". If this is the case, that means that:1. Zygotes without a copy of a specific chromosome... more

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