The Haploid Number in Drosophila Melanogaster Is 4

question 248

Multiple Choice

The haploid number in Drosophila melanogaster is 4.How many chromosomes would a trisomic individual have?

• A) 3
• B) 7
• C) 8
• D) 9
• E) 12

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Definitions:

Pretest-Posttest

A research design that measures the effect of an intervention by comparing conditions before and after the intervention is applied.

Posttest-Only

A research design where measures are taken only after the experimental manipulation, without a pretest comparison.

Mortality

The loss of subjects who decide to leave an experiment. Mortality is a threat to internal validity when the mortality rate is related to the nature of the experimental manipulation.

Experimental Design

A research design used to test hypotheses and establish cause-effect relationships by manipulating one or more independent variables and observing the effect on dependent variables.