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chiyakotiten
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Hello. I'm currently studying for Biology and I'm looking over the quizzes we took in class to see what I need work on. So far, I have trouble on frequency and location of genes. Here's one of the questions I missed on the quiz (my answers are in bold):
A man with the recessive traits of blonde hair and blue eyes marries an Asian woman whose family has no hint of either blonde hair or blue eyes.
a) Provide genotypes for each, then give the gametes for each parent.
Man:
Genotype - aabb
Gametes - ab
Woman:
Genotype - AABB
Gametes - AB
Where A=dark hair; a=blonde hair; B=brown eyes; b=blue eyes
b) All their (F1) children have dark hair and brown eyes. Give their gametes, assuming that hair color and eye assort independently.
AB, Ab, aB, ab
c) One of these F1 children marries an Icelandic person with blonde hair and blue eyes. They are prolific, producing 40 children! Of these, 18 have dark hair and brown eyes; 2 have dark hair and blue eyes; 17 are blue-eyed blondes; and 3 are brown-eyed blondes. What are the under-represented gametes of the F1 generation (i.e., the gametes of the F1 child-not the Icelander-that contribute to the enumerated children)? Why is their frequency so low?
I only received points for answering Ab and aB as the under-represented gametes. Apparently, my reasoning was "inconsistent." I found the frequency of the under-represented to be 12.5%, which I'm not sure has to do with anything.
d) Give all the information you can now infer about the location of the hair color gene and the eye color gene with reference to one another (hint: consider distance).
I did not answer this one because I wasn't sure what it was asking for and I ran out of time.
Thank you for your time
A man with the recessive traits of blonde hair and blue eyes marries an Asian woman whose family has no hint of either blonde hair or blue eyes.
a) Provide genotypes for each, then give the gametes for each parent.
Man:
Genotype - aabb
Gametes - ab
Woman:
Genotype - AABB
Gametes - AB
Where A=dark hair; a=blonde hair; B=brown eyes; b=blue eyes
b) All their (F1) children have dark hair and brown eyes. Give their gametes, assuming that hair color and eye assort independently.
AB, Ab, aB, ab
c) One of these F1 children marries an Icelandic person with blonde hair and blue eyes. They are prolific, producing 40 children! Of these, 18 have dark hair and brown eyes; 2 have dark hair and blue eyes; 17 are blue-eyed blondes; and 3 are brown-eyed blondes. What are the under-represented gametes of the F1 generation (i.e., the gametes of the F1 child-not the Icelander-that contribute to the enumerated children)? Why is their frequency so low?
I only received points for answering Ab and aB as the under-represented gametes. Apparently, my reasoning was "inconsistent." I found the frequency of the under-represented to be 12.5%, which I'm not sure has to do with anything.
d) Give all the information you can now infer about the location of the hair color gene and the eye color gene with reference to one another (hint: consider distance).
I did not answer this one because I wasn't sure what it was asking for and I ran out of time.
Thank you for your time