Question

Which of the following pairs of genotypes result in the same phenotype? (1 point)
IAIA and IAIB
IBIB and IBi
IBIB and IAIB
IBi and ii

Answer 1

Unit 4 lesson 16.. someone please help me with it.. Im not quite understanding it :)

Answer 2

Often the genotype is just written as AA, AO for blood type A, etc. The I with superscript A is referring to a gene that creates the A antigen, the I with superscript B is referring to the allele creating the B antigen, and the allele that cannot create an A or B antigen is denoted lowercase i. Thus:

I^AI^A is equivalent to AA
I^AI^B is equivalent to AB
I^BI^B is equivalent to BB
I^Bi is equivalent to BO
and so on...

So:
a) genotype AA (or I^AI^A) is blood type A, genotype AB (or I^AI^B) is blood type AB
b) genotypes BB (or I^BI^B) and BO (or I^Bi) are blood type B
c) genotypes BB (or I^BI^B) and AB (or I^AI^B) are blood types B and AB, respectively
d) BO (or I^Bi) and OO (or ii) are blood types B and O, respectively

Therefore, answer b is the only combination of two genotypes that both result in the same phenotype.

Answer 3

Thank you :) I actually get it now!

Answer 4

you're welcome (:

Answer 5

Do you know this one too? Which of the following information can be determined from examining a pedigree diagram for trait P? (1 point)
relationships among generations; an individual’s gender; whether an individual expresses trait P
an individual’s gender; an individual’s alleles for trait P; an individual’s age
an individual’s age; an individual’s height; whether an individual expresses trait P
relationships among generations; an individual’s eye color; an individual’s alleles for trait P

Answer 6

no, i'm sorry ):

Answer 7

Its alright. thanks anyways though!

Answer 8

anytime!