A Certain Kind of Snail Can Have a Right-Handed Direction

question 41

Multiple Choice

A certain kind of snail can have a right-handed direction of shell coiling (DD or Dd) or left-handed coiling (dd) . However, if direction of coiling is due to a protein deposited by the mother in the egg cytoplasm, then a Dd egg-producing snail and a dd sperm-producing snail will have offspring of which genotype(s) and phenotype(s) ?

• A) 1/2 Dd:1/2 dd; all right-coiling
• B) all Dd; all right-coiling
• C) 1/2 Dd: 1/2 dd; half right-coiling and half left-coiling
• D) all Dd; half right-coiling and half left-coiling

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Definitions:

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The total amount of money in a financial account, calculated by subtracting total debits from total credits.

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An accounting entry that increases liabilities or equity or decreases an asset or expense account.

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