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Home Q & A Board Biology-Related Homework Help Cell Biology
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YMCMB YMCMB
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12 years ago
PICTURE OF PEDIGREE IS POSTED QUESTIONS WILL FOLLOW

QUESTION 1: What type of inheritance does the gene for myopia indicate in the pedigree shown above? Explain. (2 marks)


QUESTION 2: What kind of gene does individual II-4 contribute to the genotype make-up of III-3? (1 mark)

QUESTION 3: The double line represents a marriage between close relatives. Evaluate the impact for future generations. (2 marks)

QUESTION 4: What is the probability that II-6 and II-7 have another girl who does not have myopia? Explain. (2 marks)
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wrote...
#1
Staff Member
12 years ago
Is this solved? Could you post the answers please.
- Master of Science in Biology
- Bachelor of Science
YMCMB Author
wrote...
#2
12 years ago
This has not been solved yet, could really use the help though.
wrote...
#3
Staff Member
12 years ago
I believe that the only way one can actually be nearsighted is to inherit two recessive alleles (for instance, nn). So I'm guessing that the couple in the top right is:

nn & Nn

   N   n
n Nn  nn
n Nn  nn

which forms: 1:1 Nn and nn.
- Master of Science in Biology
- Bachelor of Science
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