The Maternal Effect in Lymnaea Is Such That the Genotype

question 5

Multiple Choice

The maternal effect in Lymnaea is such that the genotype of the egg determines the direction of shell coiling regardless of the genotype of the offspring.Apparently,the cause of this spectacular maternal effect results from ________.

• A) orientation of the spindle apparatus in early cleavage
• B) genophores present in the egg cytoplasm
• C) the F factor exerting its influence on the centrosome
• D) colicins "poisoning" one of the cleavage centers
• E) allelic substitution as demonstrated from RNA injection experiments

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Definitions:

Motivation

The internal and external factors that stimulate people to take actions that lead to achieving a goal.

Dysgraphia

A neurological disorder characterized by impaired handwriting and/or spelling abilities, not associated with intellectual impairments.

Special Difficulties

Unique challenges or obstacles that are not typical or widespread.

Poor Handwriting

handwriting that is difficult to read due to issues with legibility, consistency, or form, often not meeting expected standards for age or grade level.