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Author Topic: quiz time!  (Read 15622 times)

Offline ariel

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Re: quiz time!
« Reply #25 on: 26/02/2006 00:07:41 »
come on guys! imagine a red flower crossed with a white on and it made a pink one!
now..that wouldnt be complete dominance...it would be................... : ________________
 

Offline ariel

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Re: quiz time!
« Reply #26 on: 26/02/2006 00:08:52 »
and what george said sounds about right to me :]
 

another_someone

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Re: quiz time!
« Reply #27 on: 26/02/2006 02:20:19 »
OK, after a little hunting around on Wikipedia (is that cheating?), the word I have come up with is codominance or incomplete dominance.

http://en.wikipedia.org/wiki/Dominant_gene
quote:

Codominance/ Incomplete Dominance


In certain cases, a "blend" of genes will occur because neither of the two genes of a genotype are dominant over the other. As an example, in blood cells, the trait for blood type has three different alleles: type A, type B, or type i, with i being recessive. If a father passes a gamete with the allele of type A and the mother passes on type B, then codominance results, with the offspring being type AB since neither allele type dominates the other.
Incomplete dominance occurs when certain of the recessive gene appears within the phenotype of the organism, causing a blend in between both the dominant and recessive gene.



http://en.wikipedia.org/wiki/Incomplete_dominance
quote:

n genetics, dominance relationships control whether an offspring will inherit a characteristic from the father, the mother, or some blend of both. More technically, they control the ways genes interact to express themselves as phenotypes in a diploid or polyploid individual.
There are three kinds of dominance relationships:

  • Simple dominance

  • Incomplete dominance

  • Co-dominance




Incomplete dominance


In incomplete dominance, a heterozygous genotype creates an intermediate phenotype. In this case, both the dominant and recessive gene are expressed, creating a blended or combined phenotype. A cross of two intermediate phenotypes can result in the reappearance of either the parent phenotypes or the blended phenotypes.
The classic example of this is the colours of carnations.
---- R --- r
R -- RR -- rR
r -- Rr --- rr

R is the gene for red pigment. r is the gene for no pigment.
Thus, RR offspring make a lot of red pigment and appear red. rr offspring make no red pigment and appear white. Rr and rR offspring make a little bit of red pigment and therefore appear pink.
An example of incomplete dominance in humans is mordan, a trait that is exhibited when eye color alleles from the maternal and paternal chromosomes are blended. This usually occurs when one parent has green eyes and the other parent has brown eyes–the child will have dark blue eyes.

Co-dominance


In co-dominance, neither phenotype is dominant. Instead, the individual expresses BOTH phenotypes. The most important example is in Landsteiner blood types. The gene for blood types has three alleles: A, B, and i. i causes O type and is recessive to both A and B. When a person has both A and B, they have type AB blood.
Another example involves cattle. If a homozygous bull and homozygous cow mate (one being red and the other white), then the calves produced will be roan-colored, with a mix of red and white hairs.
Example Punnett square for a father with A and i, and a mother with B and i:

---- A --- i
B -- AB - B
i –- A --- O
Amongst the very few co-dominant genetic diseases in humans, one relatively common one is A1AD, in which the genotypes Pi00, PiZ0, PiZZ, and PiSZ all have their more-or-less characteristic clinical representations.







George
« Last Edit: 26/02/2006 02:27:53 by another_someone »
 

Offline ariel

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Re: quiz time!
« Reply #28 on: 26/02/2006 03:21:05 »
WAHOOOO!
:D:D:D
hooray george-
the word was
incomplete dominance
:)
 

Offline Ray hinton

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Re: quiz time!
« Reply #29 on: 26/02/2006 13:01:12 »
isnt the english language great,it is my mother tongue,but i understand and speak more french,german,danish,spanish,and nearly as much serbo-croat,if this page is anything to go by,i wish i had paid more attention at school,act in haste,repent at leisure,as some one once said.

measure twice,cut once.
 

another_someone

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Re: quiz time!
« Reply #30 on: 26/02/2006 15:51:18 »
quote:
Originally posted by Ray hinton

isnt the english language great,it is my mother tongue,but i understand and speak more french,german,danish,spanish,and nearly as much serbo-croat,if this page is anything to go by,i wish i had paid more attention at school,act in haste,repent at leisure,as some one once said.

measure twice,cut once.



Stick around – you'll pick it up.

The few months I've been here, and had occasion to debate with all sorts of people about all sorts of things has taught me a lot.



George
 

Offline ariel

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Re: quiz time!
« Reply #31 on: 26/02/2006 19:49:39 »
puedo hablar un poco espanol
no muy bien

ustedes estan listos?

the new definition is

Processes leading to the natural death of an organism or to parts of it (e.g., leaves).
 

another_someone

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Re: quiz time!
« Reply #32 on: 26/02/2006 22:05:52 »
Are you trying to make these too easy? :)

I assume you mean atrophy, although words like apoptosis or necrosis might have a related meaning, although more specific in nature.

PS. Don't expect me to understand the Spanish – now if that was Hungarian or German, then I might have a fighting chance (although I am not particularly fluent in either, but certainly better than my Spanish).



George
 

Offline Ray hinton

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Re: quiz time!
« Reply #33 on: 26/02/2006 22:36:06 »
como porqué tan es difícil, intente algo, donde el KFC más cercano.:D:D

measure twice,cut once.
 

Offline ariel

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Re: quiz time!
« Reply #34 on: 27/02/2006 01:55:31 »
hmm...
ok
as...why...so is difficult. try something closer to KFC??
haha i said no muy bien when it comes to me and spanish!


again, sorry for these amiguous words :(:(
but the one i have in mind here starts with an
"S"
so anymore guesses?
 

another_someone

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Re: quiz time!
« Reply #35 on: 27/02/2006 05:58:09 »
The word that seems closest is senescence.  To me, it seems more the study of ageing, although arguably ageing is the process of natural death.



George
 

Offline Ray hinton

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Re: quiz time!
« Reply #36 on: 27/02/2006 13:03:41 »
quote:
sorry for these amiguous words


From Latin ambiguus, uncertain, from ambigere, to go about  : amb-, ambi-, around; see ambi- + agere, to drive; see ag- in Indo-European Roots.]   [}:)]

just clearing up any ambiguity there,  [:p]  :D

its the drugs,y-know.
 

Offline DoctorBeaver

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Re: quiz time!
« Reply #37 on: 27/02/2006 13:24:35 »
I can't believe you had to use Wiki to come up with codominance. I thought everyone knew that. :)
 

Offline ariel

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Re: quiz time!
« Reply #38 on: 27/02/2006 21:00:57 »
quote:
Originally posted by another_someone

The word that seems closest is senescence.  To me, it seems more the study of ageing, although arguably ageing is the process of natural death.



George




YES!
:D
it was senescence

OK
is it already time for the next definition?
yup!
Short, filamentous protein projecting above cell wall to help it adhere to surfaces.
 

Offline ukmicky

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Re: quiz time!
« Reply #39 on: 27/02/2006 21:23:39 »
quote:
I can't believe you had to use Wiki to come up with codominance. I thought everyone knew that.

Doc you've been very quiet recently , what happened did someone break your dam

Michael
 

Offline DoctorBeaver

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Re: quiz time!
« Reply #40 on: 28/02/2006 20:44:26 »
Michael - I've had a lot on my plate.
 

Offline Ray hinton

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Re: quiz time!
« Reply #41 on: 01/03/2006 11:22:19 »
connective growth tissue ?8)

its the drugs,y-know.
 

Offline ariel

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Re: quiz time!
« Reply #42 on: 01/03/2006 22:39:46 »
no,
heres the hint for this one
Short, filamentous protein projecting above cell wall to help it adhere to surfaces.

starts with a P!
 

Offline Ray hinton

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Re: quiz time!
« Reply #43 on: 01/03/2006 22:44:23 »
pneumonoultramicroscopicsilicovolcanoconiosis'!!!
damn i love that word,hate typing it though.

its the drugs,y-know.
 

Offline DoctorBeaver

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Re: quiz time!
« Reply #44 on: 01/03/2006 23:17:49 »
Ray, just put "miner's lung" instead :D
 

Offline Ray hinton

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Re: quiz time!
« Reply #45 on: 02/03/2006 00:00:51 »
i put in three massive words the other day, all with my "one finger method"took me about ten minutes,guess what,they were wrong [V]

its the drugs,y-know.
 

Offline ariel

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Re: quiz time!
« Reply #46 on: 02/03/2006 01:36:14 »
its only 5 letters :D
plural its only 4!
 

Offline Ray hinton

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Re: quiz time!
« Reply #47 on: 02/03/2006 02:16:35 »
i cant spell minors leung !

its the drugs,y-know.
 

Offline ariel

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Re: quiz time!
« Reply #48 on: 02/03/2006 02:58:04 »
hey look, I got it to work!
Hooray!:D

 

Offline Ray hinton

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Re: quiz time!
« Reply #49 on: 03/03/2006 00:09:46 »
clever ole you,im gonna find a much flashier one, he he.

its the drugs,y-know.
 

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Re: quiz time!
« Reply #49 on: 03/03/2006 00:09:46 »

 

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