Practice Questions

TLS Online TPP Program

#Question id: 7142

Keeping in mind the fact that genes are often named for the phenotype of a mutation in that gene, what might be the phenotype of a mutation of the Distal-less gene of Drosophila?

#Unit 5. Developmental Biology

Mutations of distal-less would fail to pattern the wing veins along their antero-posterior axis
Distal-less mutants would form only distal structures, like the tarsus (distal end) of the legs without a coxa (proximal end).
Distal-less mutants would form only proximal structures, like the coxa (proximal end) of the legs without a tarsus (distal end).
Distal-less mutants would fail to form the signaling center that controls dorso-ventral patterning.

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TLS Online TPP Program

#Question id: 5777

#Unit 8. Inheritance Biology

A ____ mutation originates during meiosis while a ____ mutation originates during mitosis.

TLS Online TPP Program

#Question id: 5778

#Unit 8. Inheritance Biology

DNA is repaired by ____ in which a pyrimidine dimer is split

TLS Online TPP Program

#Question id: 5779

#Unit 8. Inheritance Biology

Changing the codon AGC to AGA represents a ____ mutation.

TLS Online TPP Program

#Question id: 5780

#Unit 8. Inheritance Biology

What is the physical basis of mutational hotspots?

TLS Online TPP Program

#Question id: 5781

#Unit 8. Inheritance Biology

A ____ mutation affects the phenotype only under certain conditions.

TLS Online TPP Program

#Question id: 5782

#Unit 8. Inheritance Biology

A ____ mutation is intentionally caused.