The Cross of CcDd × CcDd Results in a 12:3:1

question 68

Multiple Choice

The cross of CcDd × CcDd results in a 12:3:1 phenotypic ratio. What is the expected phenotypic ratio when a CcDd × ccdd testcross is made involving the same two genes? (They are assorting independently.)

• A) 1:1:1:1
• B) 2:1:1
• C) 3:1
• D) 9:3:3:1
• E) 1:1

---

Definitions:

Basis

The difference between the spot price of an asset and its future price, or the cost basis of an investment.

Futures Price

The agreed price for the future delivery of assets in a futures contract.

Spot Price

The current market price at which a particular asset, like commodities, currencies, or securities, can be bought or sold immediately.

Profit

The financial gain realized when the amount of revenue gained from a business activity exceeds the expenses, costs, and taxes needed to sustain the activity.