AJH Pedigrees Test 2024
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a pedigree chart?
Back
A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors, used to analyze the inheritance of traits.
2.
FLASHCARD QUESTION
Front
What does it mean if a trait is dominant?
Back
A dominant trait is one that will appear in the phenotype even if only one allele is present. It masks the effect of a recessive allele.
3.
FLASHCARD QUESTION
Front
What does it mean if a trait is recessive?
Back
A recessive trait is one that will only appear in the phenotype if two copies of the recessive allele are present.
4.
FLASHCARD QUESTION
Front
How can you determine the genotype of an individual with a dominant trait?
Back
You can determine the genotype by performing a test cross with a homozygous recessive individual. If any offspring display the recessive trait, the individual is heterozygous.
5.
FLASHCARD QUESTION
Front
What is the significance of carriers in genetic diseases?
Back
Carriers are individuals who have one copy of a recessive allele for a genetic disease but do not exhibit symptoms. They can pass the allele to their offspring.
6.
FLASHCARD QUESTION
Front
How many generations are typically represented in a pedigree chart?
Back
A pedigree chart can represent multiple generations, often at least three, to show the inheritance pattern of traits.
7.
FLASHCARD QUESTION
Front
What is the purpose of using Roman numerals in pedigree charts?
Back
Roman numerals are used to denote generations in a pedigree chart, with I representing the first generation, II the second, and so on.
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