BIO 340 Mendelian Genetics Exam Questions And Answers 100% Pass
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Course
Bio 340
Institution
Bio 340
BIO 340 Mendelian Genetics Exam
Questions And Answers 100% Pass
Gene - answer-a segment of DNA encoding a polypeptide (or an RNA chain)
-the fundamental unit of heredity, which carries information from one generation to the next
what do alleles do and what are they? - answer-change their freque...
dominance - answer✔a condition in which one member of an allele pair is manifested to the exclusion
of the other. the manifested allele is dominant and the hidden allele is recessive
mender's law of segregation - answer✔1. the two copies of a gene separate (segregate) equally during
gamete formation, so that half of the gametes carry one member of the pair, and half carry the other
member
2. during fertilization, gametes unite at random. that is, they fuse without regard to which allele is
carried by each one
phenotype - answer✔the observable characteristic of an organism
genotype - answer✔the specific allelic composition of an individual
In guinea pigs coat color is determined by a single gene with two alleles. A guinea pig from a true-
breeding black strain is mated with a guinea pig from a true-breeding white strain. The F1 progeny are
all black. Two of the F1 progeny are mated with each other.
What proportion of the F2 progeny is expected to be white?
A) 1/4
B) 1/3 C) 1/2 D) 3/4 E) All - answer✔1/4
In guinea pigs coat color is determined by a single gene with two alleles. A guinea pig from a true-
breeding black strain is mated with a guinea pig from a true-breeding white strain. The F1 progeny are
all black. Two of the F1 progeny are mated with each other.
What proportion of the black F2 progeny is expected to be homozygous? - answer✔1/3
testcross - answer✔-pair genotype in question with homozygous recessive
In guinea pigs coat color is determined by a single gene with two alleles. Allele B is dominant and
encodes for black coat. Allele b is recessive and encodes for white coat.
If you cross a black guinea pig with a white one, what is the phenotype ratio in the F1 generation?
A) All black
B) All white
C) 1⁄2 black, 1⁄2 white D) 3⁄4 black, 1⁄4 white E) I cannot tell - answer✔I cannot tell
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