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pianotsy pianotsy
wrote...
Posts: 10
Rep: 0 0
9 years ago
Can some one answer those questions from http://www.mhhe.com/biosci/genbio/virtual_labs_2K8/pages/PunnettSquares.html



1.Please make sure you have read through all of the information in the “Questions” and “Information” areas.  If you come upon terms that are unfamiliar to you, please refer to your textbook for further explanation or search the word here:  http://encarta.msn.com/encnet/features/dictionary/dictionaryhome.aspx
2.Next, complete the Punnett square activity by clicking on the laboratory notebook.  Please be sure to note the possible genotypes of the various flies:
Female, red eyes   Female, red eyes   Female, white eyes   Male, red eyes   Male, white eyes
                

When you have completed the Punnett square activity, return to the laboratory scene to begin the actual laboratory activity.  
3.In this exercise, you will perform a Drosophila mating in order to observe sex-linked trait transmission.  Please click on the shelf in the laboratory.  Here you will find vials of fruit flies.  On the TOP shelf, please click on one of the female vials (on the left side) and then drag it to the empty vial on the shelf below.  Please repeat this step using one of the male vials (on the right side).  These flies will be used as the parental (P) generation. You may switch your parent choices at any time by dragging out old selections and dragging in new flies. Use the Punnett square below to predict the genotypes/phenotypes of the offspring (Note:  refer to the genotype table you created above if needed):
Genotype:
Phenotype:   Genotype:
Phenotype:
Genotype:
Phenotype:   Genotype:
Phenotype:

___% Female, red eye    ___% Female, white eye      ___% Male, red eye   ___% Male, white eye

When you are finished, click “Mate and Sort”.
4.You will now see information appear in the vials sitting on the next shelf below.  These are the offspring of the parent flies you selected above, and they represent the first filial (F1) generation.  In your “Data Table” on the bottom of the page and/or on Table I found at the end of this Worksheet, please input the numbers of each sex and phenotype combination for the F1 generation.  These numbers will be placed into the first row marked “P generation Cross”.
5.You will next need to select one of the F1 female flies and one of the F1 male flies to create the second filial (F2) generation.  Drag your selections down to the empty vial on the next shelf below and fill in the Punnett square below to predict the offspring:





Genotype:
Phenotype:   Genotype:
Phenotype:
Genotype:
Phenotype:   Genotype:
Phenotype:

___% Female, red eye    ___% Female, white eye      ___% Male, red eye   ___% Male, white eye
 
After clicking “Mate and Sort”, you will now have information on their offspring (the F2 generation) to input into your “Data Table” or Worksheet below.  This information will be placed into the second row marked “F1 generation Cross”.
NOTE:  there are additional lines remaining to use if your instructor requires the analysis of additional crosses.
6. Please finish this exercise by opening the “Journal” link at the bottom of the page and answering the questions.

Table I:
Cross Type   Phenotype of Male Parent   Phenotype of Female Parent   Number of Red eye, Male Offspring   Number of White eye, Male Offspring   Number of Red eye, Female Offspring   Number of White eye, Female Offspring
P Generation Cross                  
F1 Generation Cross                  
P Generation Cross                  
F1 Generation Cross                  
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7 Replies

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Replies
wrote...
Educator
9 years ago
https://biology-forums.com/index.php?topic=52074.0
pianotsy Author
wrote...
9 years ago
Dear sir, I finished those mutiple choice,but there is no answer for the first section.
wrote...
9 years ago
What is the first section?
Biology - The only science where multiplication and division mean the same thing.
pianotsy Author
wrote...
9 years ago
1.Please make sure you have read through all of the information in the “Questions” and “Information” areas.  If you come upon terms that are unfamiliar to you, please refer to your textbook for further explanation or search the word here:  http://encarta.msn.com/encnet/features/dictionary/dictionaryhome.aspx
2.Next, complete the Punnett square activity by clicking on the laboratory notebook.  Please be sure to note the possible genotypes of the various flies:
Female, red eyes   Female, red eyes   Female, white eyes   Male, red eyes   Male, white eyes
               

When you have completed the Punnett square activity, return to the laboratory scene to begin the actual laboratory activity. 
3.In this exercise, you will perform a Drosophila mating in order to observe sex-linked trait transmission.  Please click on the shelf in the laboratory.  Here you will find vials of fruit flies.  On the TOP shelf, please click on one of the female vials (on the left side) and then drag it to the empty vial on the shelf below.  Please repeat this step using one of the male vials (on the right side).  These flies will be used as the parental (P) generation. You may switch your parent choices at any time by dragging out old selections and dragging in new flies. Use the Punnett square below to predict the genotypes/phenotypes of the offspring (Note:  refer to the genotype table you created above if needed):
Genotype:
Phenotype:   Genotype:
Phenotype:
Genotype:
Phenotype:   Genotype:
Phenotype:

___% Female, red eye    ___% Female, white eye      ___% Male, red eye   ___% Male, white eye

When you are finished, click “Mate and Sort”.
4.You will now see information appear in the vials sitting on the next shelf below.  These are the offspring of the parent flies you selected above, and they represent the first filial (F1) generation.  In your “Data Table” on the bottom of the page and/or on Table I found at the end of this Worksheet, please input the numbers of each sex and phenotype combination for the F1 generation.  These numbers will be placed into the first row marked “P generation Cross”.
5.You will next need to select one of the F1 female flies and one of the F1 male flies to create the second filial (F2) generation.  Drag your selections down to the empty vial on the next shelf below and fill in the Punnett square below to predict the offspring:





Genotype:
Phenotype:   Genotype:
Phenotype:
Genotype:
Phenotype:   Genotype:
Phenotype:

___% Female, red eye    ___% Female, white eye      ___% Male, red eye   ___% Male, white eye
 
After clicking “Mate and Sort”, you will now have information on their offspring (the F2 generation) to input into your “Data Table” or Worksheet below.  This information will be placed into the second row marked “F1 generation Cross”.
NOTE:  there are additional lines remaining to use if your instructor requires the analysis of additional crosses.
6. Please finish this exercise by opening the “Journal” link at the bottom of the page and answering the questions.

Table I:
Cross Type   Phenotype of Male Parent   Phenotype of Female Parent   Number of Red eye, Male Offspring   Number of White eye, Male Offspring   Number of Red eye, Female Offspring   Number of White eye, Female Offspring
P Generation Cross                 
F1 Generation Cross                 
P Generation Cross                 
F1 Generation Cross                 
wrote...
9 years ago
Still need this? Sorry it took so long to reply Confounded Face
Biology - The only science where multiplication and division mean the same thing.
pianotsy Author
wrote...
9 years ago
 Frowning Face Frowning Face Frowning Face too hard for me
wrote...
Educator
9 years ago
This is really easy, believe me lol The reason I don't feel compelled to trying it is that the formatting is all messed up and to look through it would take me an hour I don't have. If anyone does figure it out, including pianotsy, please update us.
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