Mrs. Jo's DNA Qz

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| By Nikiejo

Nikiejo

Community Contributor

Quizzes Created: 4 | Total Attempts: 956

Questions: 10 | Attempts: 104 | Updated: Mar 18, 2023

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Genetics quiz covering structure and fx of DNA.

Questions and Answers

1.

In the strawberry- DNA Isolation lab, what was the white floating stringy substance?
- A.
  
  Strawberrry guts
- B.
  
  DNA that has been removed from the nucleus bc we smooshed up the stawberries
- C.
  
  DNA removed from the cell wall bc we pounded the strawberries.
Correct Answer
B. DNA that has been removed from the nucleus bc we smooshed up the stawberries

Explanation
DNA is located in the nucleus of the cells

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1
0
2.

What does the structure of DNA look like?
- A.
  
  Sugar phospate with genetic base pairs
- B.
  
  Double helix
- C.
  
  Wheel
Correct Answer
B. Double helix

Explanation
twisted ladder- double helix

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3.

Asexual reproduction creates a:
- A.
  
  Clone- exact copy of the parent
- B.
  
  Unique individual- 50% of both parents
- C.
  
  Some of mom and more of dad
Correct Answer
A. Clone- exact copy of the parent

Explanation
asexual reproduction copies the DNA

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4.

Who first predicted a pattern that genetic info was passed from parent to offspring in his experiments with pea plants?
- A.
  
  Watson and Crick
- B.
  
  Delaney
- C.
  
  Gregor Mendel
Correct Answer
C. Gregor Mendel

Explanation
Gregor Mendel is the correct answer because he was the first to propose the theory of inheritance through his experiments with pea plants. Mendel discovered that certain traits are passed down from parents to offspring in a predictable pattern, which laid the foundation for our understanding of genetics. Watson and Crick, on the other hand, are known for their discovery of the structure of DNA, not for predicting the pattern of genetic information transfer. Delaney is not a relevant figure in the context of genetic inheritance.

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5.

This word means the same genotype- such as AA or aa.
- A.
  
  Heterozygous
- B.
  
  Homozygous
- C.
  
  Hybrid
- D.
  
  Pure
- E.
  
  Both homozygous and pure
Correct Answer
E. Both homozygous and pure

Explanation
The term "homozygous" refers to having two identical alleles for a particular gene, either both dominant (AA) or both recessive (aa). The term "pure" implies that an organism is homozygous for a particular trait and will produce offspring with the same genotype. Therefore, both "homozygous" and "pure" can be used to describe the same genotype, whether it is homozygous dominant or homozygous recessive.

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6.

The word tha means to cover over or dominate such as Aa or AA but not aa
- A.
  
  Dominant
- B.
  
  Recessive
- C.
  
  Deteriorate
Correct Answer
A. Dominant

Explanation
The word "dominant" means to cover over or dominate, like the capital letters Aa or AA. It refers to a trait or characteristic that is more powerful or influential compared to another. In genetics, dominant traits are expressed when there is at least one dominant allele present, while recessive traits are only expressed when two recessive alleles are present. The word "deteriorate" does not relate to the given definition and is therefore not the correct answer.

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7.

The word that means different such as Ss but not SS.
- A.
  
  Homozygous
- B.
  
  Pure
- C.
  
  Hybrid
- D.
  
  Heterozygous
- E.
  
  Both hybrid and heterozygous
Correct Answer
E. Both hybrid and heterozygous

Explanation
The word that means different such as Ss but not SS is heterozygous. Heterozygous refers to an individual having two different alleles for a particular gene. In this case, the individual has one allele for the dominant trait (S) and one allele for the recessive trait (s). This results in a different phenotype than an individual with two alleles for the same trait (SS), which would be homozygous. The term hybrid is also applicable in this context as it refers to the offspring resulting from the crossbreeding of two different varieties or species.

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8.

This word means to be hidden or masked.
- A.
  
  Recessive
- B.
  
  Dominant
- C.
  
  Relative
Correct Answer
A. Recessive

Explanation
The word "recessive" means to be hidden or masked. In genetics, it refers to a trait that is only expressed when an individual has two copies of the recessive gene. This means that the trait is not visible or dominant in the presence of a dominant gene. Therefore, recessive accurately describes the concept of being hidden or masked.

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9.

What would the parents genotype be?
- A.
  
  TT x tt
- B.
  
  TT x TT
- C.
  
  Tt x Tt
- D.
  
  Tt x tt
Correct Answer
C. Tt x Tt

Explanation
The parents' genotype would be Tt x Tt. This is because the capital letter T represents the dominant allele for a certain trait, while the lowercase letter t represents the recessive allele. When a dominant allele is present, it will always be expressed in the phenotype. Therefore, if one parent has the genotype TT (homozygous dominant) and the other parent has the genotype tt (homozygous recessive), their offspring will have the genotype Tt (heterozygous) since they inherit one dominant and one recessive allele from each parent.

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10.

If both parents are homozygous recessive, what chance will the offspring show any dominant characteristics.
- A.
  
  100%
- B.
  
  25%
- C.
  
  50%
- D.
  
  0%
Correct Answer
D. 0%

Explanation
If both parents are homozygous recessive, it means that they both have two copies of the recessive allele for a particular trait. Since the recessive allele is the only allele present in both parents, there is no possibility for the offspring to inherit a dominant allele. Therefore, the chance for the offspring to show any dominant characteristics is 0%.

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Current Version
Mar 18, 2023

Quiz Edited by
ProProfs Editorial Team
Apr 13, 2010

Quiz Created by
Nikiejo

Mrs. Jo's DNA Qz

In the strawberry- DNA Isolation lab, what was the white floating stringy substance?

What does the structure of DNA look like?

Asexual reproduction creates a:

Who first predicted a pattern that genetic info was passed from parent to offspring in his experiments with pea plants?

This word means the same genotype- such as AA or aa.

The word tha means to cover over or dominate such as Aa or AA but not aa

The word that means different such as Ss but not SS.

This word means to be hidden or masked.

What would the parents genotype be?

If both parents are homozygous recessive, what chance will the offspring show any dominant characteristics.