How Would One Explain a Testcross Involving F1 Dihybrid Flies

question 6

Multiple Choice

How would one explain a testcross involving F1 dihybrid flies in which more parental-type offspring than recombinant-type offspring are produced?

• A) The two genes are closely linked on the same chromosome.
• B) The two genes are linked but on different chromosomes.
• C) Recombination did not occur in the cell during meiosis.
• D) The testcross was improperly performed.
• E) Both of the characters are controlled by more than one gene.

---

Definitions:

Death

The end of life, characterized by the cessation of vital functions or processes.

Demographers

Experts who study population dynamics, including birth rates, death rates, aging, and migration, to understand how populations change over time.

Older Population

Refers to individuals in a society who are considered elderly, often defined as those 65 years of age and older, with specific needs and challenges.

Aged 65

Refers to individuals who have reached the age of 65 years, often considered the beginning of old age or retirement age in many societies.