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Questions and Answers
In genetics, if a homozygous dominant brown-eyed parent (BB) and a heterozygous brown-eyed parent (Bb) have a child, what is the probability that the child will have blue eyes?
In genetics, if a homozygous dominant brown-eyed parent (BB) and a heterozygous brown-eyed parent (Bb) have a child, what is the probability that the child will have blue eyes?
- 25%
- 50%
- 75%
- 0% (correct)
A scientist is studying a new species of plant. She observes that some plants have smooth leaves, while others have hairy leaves. She crosses a true-breeding smooth-leaved plant with a true-breeding hairy-leaved plant. All of the offspring have smooth leaves. What can she conclude about the hairy leaf trait?
A scientist is studying a new species of plant. She observes that some plants have smooth leaves, while others have hairy leaves. She crosses a true-breeding smooth-leaved plant with a true-breeding hairy-leaved plant. All of the offspring have smooth leaves. What can she conclude about the hairy leaf trait?
- It is a recessive trait. (correct)
- It is a sex-linked trait.
- It is a dominant trait.
- It is an incompletely dominant trait.
In a certain species of beetle, green coloration (G) is dominant to brown coloration (g). If two heterozygous beetles (Gg) mate, what is the probability that their offspring will also be heterozygous?
In a certain species of beetle, green coloration (G) is dominant to brown coloration (g). If two heterozygous beetles (Gg) mate, what is the probability that their offspring will also be heterozygous?
- 50% (correct)
- 25%
- 100%
- 75%
Which of the following best describes the relationship between genes, DNA, and chromosomes?
Which of the following best describes the relationship between genes, DNA, and chromosomes?
Why are acquired traits not passed on to offspring through genetic inheritance?
Why are acquired traits not passed on to offspring through genetic inheritance?
Flashcards
Who is Gregor Mendel?
Who is Gregor Mendel?
The scientist who discovered the basic principles of genetics through pea plant experiments.
What does Homozygous mean?
What does Homozygous mean?
Having two identical alleles for a particular gene.
What are DNA bases?
What are DNA bases?
The 'rungs' of the DNA ladder, including adenine (A), thymine (T), guanine (G), and cytosine (C).
What is an acquired trait?
What is an acquired trait?
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What shape is DNA?
What shape is DNA?
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Study Notes
- Gregor Mendel discovered the basic principles of genetics by studying pea plants.
- A dominant trait is most likely expressed if a child inherits a recessive trait from one parent and a dominant trait from the other because the dominant gene is stronger.
- An organism with two of the same alleles for a trait is described as homozygous.
- If a mother has blue eyes (bb) and the father has brown eyes (BB), their child most likely has brown eyes.
- A scar from a burn is an acquired trait rather than an inherited trait.
- The molecules that make up the "rungs" of the DNA ladder are called bases or nucleotides such as adenine (A), thymine (T), guanine (G), and cytosine (C).
- The shape of a DNA molecule is best described as a double helix.
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Description
Explore genetics principles: dominant traits expression, homozygous organisms, and inherited traits. Learn about DNA's double helix structure and nucleotide bases (adenine, thymine, guanine, cytosine) that form the rungs of the DNA ladder.
