Evolution

NEET Biology · 96 questions · Page 10 of 10 · Click an option or "Show Solution" to reveal answer

Q91

Frequency of an allele in an isolated population may change due to

A genetic Drift

B gene flow

C mutation

D natural selection

Correct Answer

Option A

Solution

(a) Genetic drift causes random changes in allele frequency, especially in small isolated populations.

Q92

Industrial melanism as observed in peppered moth proves that

A melanic form has no selective advantage in industrial areas

B lighter-form moth has no selective advantage anywhere

C melanism is a genetic trait

D true black melanic forms arise by a recurring random mutation

Correct Answer

Option D

Solution

(d) Industrial melanism: the frequency of melanic moths increased in polluted areas via natural selection.

Q93

During organ differentiation in Drosophila an organ is modified to another such as wings replaced by legs. Genes responsible for such metamorphosis are called

A Homeotic genes

B Plastid genes

C Double dominant genes

D Complimentary genes

Correct Answer

Option A

Solution

(a) Homeotic genes control body pattern formation; mutations cause transformation of one body part to another.

Q94

Forthcoming generations are less adaptive than their parental generation due to

A natural selection

B mutation

C genetic drift

D adaptation

Correct Answer

Option B

Solution

(b) Mutations reduce adaptability of future generations relative to parents.

Q95

Frequency of an allele in a isolated population may change due to

A genetic Drift

B gene flow

C mutation

D natural selection

Correct Answer

Option A

Solution

(a) Genetic drift causes random changes in allele frequency, especially in small isolated populations.

Q96

From his experiments, S.L. Miller produced amino acids by mixing

A CH3, H2, NH4 and water vapor at 800°C

B CH4, H2, NH3 and water vapor at 600°C

C CH3, H2, NH3 and water vapor at 600°C

D CH4, H2, NH3 and water vapor at 800°C

Correct Answer

Option D

Solution

(d) Miller (1953): CH4, H2, NH3 and water vapor at 800°C with electric discharge produced amino acids.

Ready for a full NEET mock test? Timed · full syllabus · instant results

Take a Mock Test →