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Midterm II

Sample exam

I did not have a previous sample exam. So I am creating this sample exam and adding questions as they are ready. Come back and check for more questions. It should be complete by Saturday afternoon.

The key is at the bottom. Try to understand and answer the question before you look at the key...

  • Q1 Consider the inheritance problem represented in the table below displaying genotypes and number of individuals produced in a cross. Dominant loci are represented as +. The gene phase (no order implied) is _______ and the gene order (no phase implied) is ________:
m r q	3
m + +	183
+ r +	264
m + q	288
+ + q	1101
+ + +	9
+ r q	138
m r +	1014
    • A. mr+, m-q-r
    • B. +rq, q-m-r
    • C. +r+, r-m-q
    • D. +++, m-r-q
    • E. m++, r-m-q
  • Q2 A and B = chromosomal loci. Dominant and recessive alleles = upper and lower case letters. Parents AABB and aabb are crossed. The hybrid AaBb is crossed to aabb. The following phenotypic classes and progeny numbers are produced: AB, 30; Ab, 450; aB, 410; ab, 35. Allele A is in coupling with allele _____. The best estimate of map distance between the A and B loci is ___ m.u.:
    • A. a, 3
    • B. b, 6
    • C. B, 12
    • D. a, 24
    • E. b, 10

Key

1-a,2-b,

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