Refer to the Following Information to Answer the Questions Below

question 11

Multiple Choice

Refer to the following information to answer the questions below.
Gene S controls the sharpness of spines in a type of cactus. Cactuses with the dominant allele, S, have sharp spines, whereas homozygous recessive ss cactuses have dull spines. At the same time, a second gene, N, determines whether or not cactuses have spines. Homozygous recessive nn cactuses have no spines at all.
-If doubly heterozygous SsNn cactuses were allowed to self-pollinate, the F₂ would segregate in which of the following ratios?

• A) 3 sharp-spined:1 spineless
• B) 1 sharp-spined:2 dull-spined:1 spineless
• C) 1 sharp-spined:1 dull-spined:1 spineless
• D) 1 sharp-spined:1 dull-spined
• E) 9 sharp-spined:3 dull-spined:4 spineless

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Definitions:

Predictor Variables

Independent variables in statistical models that are used to predict outcomes of interest.

T-Statistic

A value derived from a t-test used to determine the significance of the difference between two means in the presence of variability.

Least-Squares Prediction

A method used in linear regression to estimate the value of a dependent variable based on the minimum sum of squared deviations from the predicted values.

Prediction Of Y

Estimating the value of the dependent variable in a regression analysis based on the independent variable(s).