If a Scientist Discovers an Arabidopsis Mutant That Does Not

question 26

Multiple Choice

If a scientist discovers an Arabidopsis mutant that does not store starch in plastids but has normal gravitropic bending, what aspect of our understanding would need to be reevaluated?

• A)the role of auxin in gravitropism
• B)the role of calcium in gravitropism
• C)the role of statoliths in gravitropism
• D)the role of light in gravitropism
• E)the role of differential growth in gravitropic bending

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Definitions:

Autosome

Any chromosome that is not a sex chromosome, involved in determining the genetic traits of an organism except for the sex.

Allele

One of two or more versions of a gene that determine variations in a hereditary characteristic.

Gamete

A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote.

Chromosomes

Protein-based, threadlike formations present in the nuclei of plant and animal cells, consisting of a single DNA (deoxyribonucleic acid) molecule.