What conclusions can be made of a five-fingered child born to polydactylous parents, a dominant trait characterized by extra fingers?
A) a mutation reversed the allele to its normal state in either of the parents' gametes
B) polydactyly must not be a genetic condition
C) the parents were both heterozygous for the condition
D) the environmental factors favoring the development of polydactyly were absent for the child
E) polydactyly must result from an epistatic interaction
Answer: C) the parents were both heterozygous for the condition
You might also like to view...
Which type of microscope has a lower magnification than other microscopes but allows a user to see a whole organism at one time?
a. dissecting b. light c. scanning electron d. transmission electron
The genotypes of two F1 plants are SsYy, with S and Y alleles dominant to s and y. If fertilization occurs at random
____________________ (number) genotypes and ____________________ (number) phenotypes will result in the F2 generation. Fill in the blank(s) with the appropriate word(s).
Which of the following Krebs cycle intermediates can be used to produce chlorophyll? Select all correct answers
A. ?-ketoglutarate B. oxaloacetate C. succinyl-CoA
Would you expect the number of virions to be the same if you measured them by the plaque assay or by counting using the electron microscope? Why?
A. Yes-both methods measure the total number of virus particles in a solution. B. No-the plaque assay only measures viable virus particles, while the electron microscope cannot distinguish between defective and viable virus. C. No-you cannot count virus particles by using a plaque assay. You can only get a relative difference in quantity from one preparation of virus particles to another with this method. D. Yes-only fully functioning viruses will be released from a host cell, so the quantified number of virus particles in a plaque assay should be identical to the number of free virus particles counted by electron microscopy within a given preparation.