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BIO 340 Exam 2 Cogbooks and Recitation Questions and Complete Solutions Graded A+
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BIO 340 Exam 2 Cogbooks and Recitation Questions and Complete Solutions Graded A+
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BIO 340 Exam 2Cogbooks and Recitation
Questions and Complete
Solutions Graded A+
Denning [Date] [Course title]
, If black and white true-breeding mice are mated and the result is all gray offspring, what inheritance
pattern would this be indicative of? - Correct Ans: Incomplete Dominance
ABO blood groups are an example of: - Correct Ans: Multiple alleles and codominance.
Could an individual with blood type O (genotype ii) be a legitimate child of parents in which one parent
had blood type A and the other parent had blood type B? - Correct Ans: Yes, if each parent carries one i
allele.
A white splashed (Bl/Bl) Andalausian chicken and a black (bl/bl) Andalusian chicken are crossed. The
heterozygotes produced show an intermediate phenotype (blue). What inheritance pattern would this
be indicative of? - Correct Ans: Incomplete dominance.
A person with only one Sickle Cell Anemia allele and one unaffected allele will have some normal red
blood cells and some abnormal. What inheritance pattern would this be indicative of? - Correct Ans:
Codominance.
In a mating between two individuals that are heterozygous for a recessive lethal allele that is expressed
in utero, what genotypic ratio (homozygous dominant:heterozygous:homozygous recessive) would you
expect to observe in the offspring? - Correct Ans: 1:2:0
In rats, gene B produces black coat color if the genotype is B-, but black pigment is not produced if the
genotype is bb. At an independent locus, gene D produces yellow pigment if the genotype is D-, but no
pigment is produced when the genotype is dd. Production of both pigments results in brown coat color.
If neither pigment is produced, coat color is cream. The genotype of parents of litters with the following
phenotype distribution 3 brown, 3 yellow, 1 black, 1 cream is: - Correct Ans: BbDd x bbDd
In rats, gene B produces black coat color if the genotype is B-, but black pigment is not produced if the
genotype is bb. At an independent locus, gene D produces yellow pigment if the genotype is D-, but no
pigment is produced when the genotype is dd. Production of both pigments results in brown coat color.
If neither pigment is produced, coat color is cream. The phenotype of parents of litters with the
following phenotype distribution 3 brown, 3 yellow, 1 black, 1 cream is: - Correct Ans: Brown and
yellow.
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