Introduction to Genetics

Question 1

In fruit flies, straight wings are dominant and curly wings are recessive. What will the generations look like? Assume that Mendel’s method of crossing two true breeding parents with opposite traits is followed. Check all that apply.

Revolt · Accepted Answer

The P generation has straight wings and curly wings.; The F1 generation has all straight wings.; The F2 generation has straight wings and curly wings.

Question 2

In pea plants, yellow seed color is dominant and green seed color is recessive. What will the generations look like? Assume that Mendel’s method of crossing two true breeding parents with opposite traits is followed. Check all that apply.

Revolt · Accepted Answer

The P generation has yellow and green seeds.; The F1 generation has all yellow seeds.; The F2 generation has yellow and green seeds.

Question 3

In humans, a cleft chin is dominant and no-cleft is recessive. What will the generations look like? Assume that Mendel’s method of crossing two true breeding parents with opposite traits is followed. Check all that apply.

Revolt · Accepted Answer

The F1 generation will have all cleft chins.; The P generation and F2 generation will have cleft chins and no-cleft chins.

Question 4

What information did you include in your answer? Check all that apply.

Revolt · Accepted Answer

DNA is responsible for traits.; A section of DNA that codes for a specific trait is called a gene.; Half of your DNA comes from each parent.; Your traits are a combination of your parents’ traits.; DNA is the blueprint for proteins, which play many roles in the body.

Question 5

What is the role of DNA in transmitting genetic information? Describe DNA’s important genetic role in a few sentences below.

Revolt · Accepted Answer

DNA carries hereditary information that influences traits. Genes are sections of DNA that code for specific traits, and DNA provides instructions for making proteins that perform many roles in the body. A person inherits half of their DNA from each parent, so their traits are a combination of their parents’ traits.

Introduction to Genetics Answers

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