Two Genes ( a and B ) Are Located on Each

question 34

Multiple Choice

Two genes ( A and B ) are located on each of two pairs of homologous chromosomes. In a tetrad, one sister chromatid contains alleles ab , while the other sister chromatid contains alleles AB (upper and lower case indicate different alleles of the same gene) . Which genetic combinations are possible in the four gametes that are produced from a single chiasma between these chromosome pairs?

• A) Ab , AB , ab , aB
• B) Ab , Ab , aB , aB
• C) Aa , Bb , ab , Ab
• D) Ab , Ab , AB , AB
• E) AB , AB , ab , ab

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Definitions:

Free Association

A psychoanalytic technique where the patient is encouraged to share thoughts freely, revealing subconscious feelings and desires.

Interpretation

The process of explaining the meaning of something; in psychology, often referring to the analysis of dreams, actions, or thoughts.

Dream

A succession of images, ideas, emotions, and sensations that usually occur involuntarily in the mind during certain stages of sleep.

Transference

The process by which emotions and desires originally associated with one person are unconsciously shifted to another person, especially in psychoanalysis.