Genetics | Dihybrid Cross (Example 2)

Genetics | Dihybrid Cross (Example 2)

Assessment

Interactive Video

Science, Biology

University

Hard

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The video tutorial explains the process of performing a dihybrid cross, focusing on genes A and B, which code for height and speed, respectively. Both maternal and paternal genotypes are heterozygous for these genes. The tutorial covers setting up the dihybrid cross, filling in the 16 cells, and calculating both genotypic and phenotypic ratios. It emphasizes the importance of correctly setting up the cross and provides a shortcut for memorizing the phenotypic ratio of 9:3:3:1 when crossing two heterozygotes.

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10 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What is a dihybrid cross and how does it differ from a monohybrid cross?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

Describe the genotypes of the maternal and paternal organisms in the dihybrid cross example.

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

How many cells are there in a Punnett square for a dihybrid cross?

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4.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the significance of setting up the dihybrid cross correctly?

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5.

OPEN ENDED QUESTION

3 mins • 1 pt

Explain how to fill in the cells of a dihybrid cross.

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6.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the genotypic ratio obtained from the dihybrid cross example?

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7.

OPEN ENDED QUESTION

3 mins • 1 pt

How does the phenotypic ratio of a dihybrid cross compare to that of a monohybrid cross?

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