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anonymous
 one year ago
In pea plants, purple flowers (P) are dominant over white flowers (p) and tall stems (T) are dominant over short stems (t). Complete a dihybrid cross for parents with the genotypes: PpTT × ppTt and answer the following in complete sentences.
Describe how you would set up a Punnett square for this cross.
List the likelihood of each possible offspring genotype.
List the likelihood of each possible offspring phenotype. @niels5x9
anonymous
 one year ago
In pea plants, purple flowers (P) are dominant over white flowers (p) and tall stems (T) are dominant over short stems (t). Complete a dihybrid cross for parents with the genotypes: PpTT × ppTt and answer the following in complete sentences. Describe how you would set up a Punnett square for this cross. List the likelihood of each possible offspring genotype. List the likelihood of each possible offspring phenotype. @niels5x9

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Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0what do u think the answer is ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Rushwr I honestly don't know

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do you know what a punnet square is?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@niels5x9 yes I do know what a punnet square is

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do you know how to make a punnet square of a dihybrid cross?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I very vaguely know how to make it :(

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okey here is an example:

shreehari499
 one year ago
Best ResponseYou've already chosen the best response.0Cool @niels you are there... ,I'll leave

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yeah I know what it looks like and stuff

Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0@Devingee23 1st u would have to write down the gametes for each parent.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It's pretty much just finding the probabilities that trips me up

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So it would be PT pT pT and pt?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the number of times a genotype shows up in the square devided by the total number of squares is the probability of a certain genotype

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So I had it right? for that part @niels5x9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0o sorry no it is PT, PT, pT and pT. No pt

Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0for PpTT parent it would be PT and pT for ppTt > pT and pt Now it's just the matter of punnet square

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0because there is no little t in the starting genotype

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay so it is PT, PT, pT, and pT?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh hehe i think I understood you wrong I thought you meant on one side... you are right no problem

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so now what do I do?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0one side has PT and pT and the other has pT and pt

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439997452539:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you draw a square like that and you fill up the square combining the 2 genotypes (so the top left one is PpTT)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0THe next one would be PpTt? @ niels5x9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So now what we just fill in the rest of the square?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay so all of them together are PpTT, PpTt, ppTt and ppTT?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and then we can go on to determine the likelyhood of every genotype: the genotypes we have are: PpTT PpTt ppTT pptT the total number of genotypes is four and every genotype comes up one time. what do you think is the probability of every genotype showing up?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0magnificent. now for the last question do you know what dominent and resisive means?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I know for resecisve you have to have two of that one gene right? @niels5x9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0*dominant and ressesive exuse my english

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0when you have two genes in a pair one can be dominant over another, like P is dominant over p. that means that if you have the genotype Pp your fenotype will be P and not p. p is the ressesive gene here. do you understand?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okey you have two genes P and p. some people have PP, they will have a fenotype P. some people have pp, they will have a fenotype p. But an organism can have only one fenotype so one should be dominant over another meaning that in case of Pp one should come out as the phenotype.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So if it is Pp it will be purple but if it is pp it will be white?

Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0yeah PP also means that its purple.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0a lot of genetic disorders are also recessive and that means that somebody can have one of the genes for the disease but not notice it, but when they have children with another person with one gene of the disease their child might get the dissease.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so getting back to the exersize, you now work out what the fenotype of those 4 genotypes is

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okey so in the first one: PpTT in Pp P is dominant so phenotype: P in TT: T so the phenotype is: TP

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well I know no matter what it will be a tall plant right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So in the second one it will be purple and tall

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the third white and tall and in the last white and tall?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so really there is a 50% chance that it will be purple or white right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now what do you think is the next step in getting the chance in phenotype

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0WOuld it be 50% @niels5x9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@niels5x9 r u still there?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry i was distracted yes it is!!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0SO are we done then?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so now you have all the questions answered

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0btw sorry @shreehari499 I just realised that this might have been more of your area of expertise.

shreehari499
 one year ago
Best ResponseYou've already chosen the best response.0Yeah it might be but you've done a good job..! Bravo!
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