In a Dihybrid Cross Where Both Parents Are Heterozygous, the Expected

question 27

Multiple Choice

In a dihybrid cross where both parents are heterozygous, the expected phenotypic ratio is

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

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Definitions:

Telophase

is the final phase of cell division, during which chromosomes de-condense and two new nuclear envelopes begin to form.

Prophase

The first stage of cell division (mitosis and meiosis), wherein chromosomes become visible, and the nuclear envelope breaks down.

Anaphase

A phase of mitosis and meiosis in which chromosomes separate and move to opposite ends of the cell.

Metaphase

A stage during cell division (mitosis and meiosis) where chromosomes align at the equatorial plate of the cell, preparing for segregation into two new nuclei.