How many affected individuals are on this pedigree chart, and how can you tell?

3, those who are shaded black with a slash

Is this chart following a dominant or recessive trait and how do you know?

recessive because it did not show up in every generation

dominant, because it shows up only in males

dominant because most of the people affected have died

recessive because it shows up only in males

Charting Lineage: Pedigree Chart Reading Quiz

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| By Despinoza

Despinoza

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Quizzes Created: 2 | Total Attempts: 20,819

Questions: 6 | Attempts: 17,338 | Updated: Sep 17, 2024

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Charting Lineage: Pedigree Chart Reading Quiz - Quiz

Dive into the intricate world of genealogy with our 'Charting Lineage: Pedigree Chart Reading Quiz.' Unravel the complexities of pedigree charts, testing your skills in deciphering family relationships, genetic traits, and ancestral connections. This quiz is designed to enhance your understanding of genealogical charting techniques and unveil your proficiency in tracing familial history.

Whether you're a budding genealogist or just curious about your roots, this quiz offers a stimulating journey through the art of interpreting pedigree charts. Challenge yourself with questions that delve into the heart of familial connections and chart your course through the branches of ancestry.

For a Read moreformal definition of the topic, it's a chart that is used to track the presence or absence of phenotype through one or more generations of a family. This quiz is a short assessment test for you consisting of six questions.

Questions and Answers

1.

How many affected individuals are on this pedigree chart, and how can you tell?
- A.
  
  6, those who are shaded black
- B.
  
  3, those who are shaded black with a slash
- C.
  
  11, those who have a slash
- D.
  
  12, those who are not shaded
Correct Answer
A. 6, those who are shaded black

Explanation
The correct answer is 6, those who are shaded black. This can be determined by looking at the pedigree chart and identifying the individuals who are shaded black. These shaded individuals represent the affected individuals in the chart.

Rate this question:

3
1
2.

Is this chart following a dominant or recessive trait and how do you know?
- A.
  
  Dominant, because it shows up only in males
- B.
  
  Dominant because most of the people affected have died
- C.
  
  Recessive because it did not show up in every generation
- D.
  
  Recessive because it shows up only in males
Correct Answer
C. Recessive because it did not show up in every generation

Explanation
The correct answer is recessive because it did not show up in every generation. This suggests that the trait is not consistently present in each generation, which is a characteristic of a recessive trait. If the trait was dominant, it would be expected to appear in every generation, as it would be passed on from at least one affected parent to their offspring.

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7
9
3.

If this chart is following the recessive trait for albinism (people who are albinos, aa), then what is the genotype of the parents at the top of the chart?
- A.
  
  Aa and Aa
- B.
  
  Aa and aa
- C.
  
  Aa and Aa
- D.
  
  AA and AA
Correct Answer
C. Aa and Aa

Explanation
Based on the information given, the chart is following the recessive trait for albinism. This means that individuals who are albinos have the genotype aa. Therefore, the genotype of the parents at the top of the chart must be Aa, as they are carriers of the recessive allele but do not express the trait themselves.

Rate this question:

3
0
4.

How many members of this family are deceased?
- A.
  
  11
- B.
  
  6
- C.
  
  9
- D.
  
  4
Correct Answer
A. 11

Explanation
The answer is 11 because it is the highest number among the options provided. This suggests that out of the given options, 11 is the number of deceased members in the family.

Rate this question:

7
5
5.

The parents that begin this chart are the first generation. How many of their children were albinos?
- A.
  
  2
- B.
  
  6
- C.
  
  4
Correct Answer
A. 2

Explanation
The question asks how many of the first generation's children were albinos. The answer is 2, indicating that only two children out of the total number of children had albinism.

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2
0
6.

In the third generation, what is the genotype of the only child of the third mating from the left ?
- A.
  
  Aa
- B.
  
  AA
- C.
  
  A
- D.
  
  Aa
Correct Answer
D. Aa

Explanation
For a child to be affected by an autosomal recessive condition, both alleles must be the recessive form (a). Since both parents are carriers (Aa), they each contributed a recessive allele, making the child's genotype aa.

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14
0

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Sep 17, 2024

Quiz Edited by
ProProfs Editorial Team
May 11, 2012

Quiz Created by
Despinoza

Charting Lineage: Pedigree Chart Reading Quiz

How many affected individuals are on this pedigree chart, and how can you tell?

Is this chart following a dominant or recessive trait and how do you know?

If this chart is following the recessive trait for albinism (people who are albinos, aa), then what is the genotype of the parents at the top of the chart?

How many members of this family are deceased?

The parents that begin this chart are the first generation. How many of their children were albinos?

In the third generation, what is the genotype of the only child of the third mating from the left ?