Exam 2 Name tn Multiple choice/Fill in the Blank (1 answerlquestion) (30 pts) 1)

Question

Exam 2 Name tn Multiple choice/Fill in the Blank (1 answerlquestion) (30 pts) 1)During a dinybrid ss moving two inked genes, 18% ef the resutIngganele.O ed . Genetics Fall 2015 Name Annn Yebsuko 5 two linked genes aremap unts apan A) 0.18 B) 180 E) 32 2) The closer together two genes are on a chromosome, 0 9the more likely thereot more likely there will be a recombination event between them the more lkely they are to be linked C) the greater the chance that a double crossover will occur between them 0) the less likely there will be a recombination event between them E) the less ikely they are to be good genesic markers 3)Interference is a phenomenon nch A) the number of observed double crossovers is less han the number of epected souble cressovers B) the number of observed double crossovers is greater than the number of expected double orosovers C) the oocumence of one crossover interfleres with the formation of D) no double crossovers occur among neartby genes A) the number of observed double crossoversless Pan the number of egede Boh A and A and C and vi a simple blood sest nevealed the tolowing lood ss 4) For each of the cases belowQUL ) Mother has A type, father has B type, and iO Mother has A. father has B, and chid has A. Ha Table 132 ABO Bod Groups Mother is AB, tather has o, dad hasAB v) Mother is A, father has B, child has AB(ADBor v) Mother is O, father has AB, child has O [ For each of the cases listed above a il, or v) which ofthe statements (A, B or C) listed below cormectly applies CIRCLE THE CORRECT ANSWER (A, B OR C) A) Father is biological father B) Father cannot be biological father C) It is incondlusive whether father is the biological Father

Explanation / Answer

1)

The % of recombination is equal to the map units (m.u) or centi-morgans (c.m). The formula for recombination is: (number of recombinants / total progeny). Thus, the correct option is (D) 18.

2)

The closer the genes on a chromosome, then there will be less likely the recombination between the genes. Thus, the correct option is (D).

3)

Interference is a phenomenon in which the number of observed double crossovers is less than the number of expected double crossovers and the occurrence of one crossover interference occurrence of another crossover nearby (Coeffcinet of coincidence). The formula for calculation if interference is 1-Coeffcinet of coincidence (c.o.c), thus the correct option is (E).

4)

It is inconclusive that the father is a biological father. Thus, the correct option is (c).

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