Pedigrees
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a pedigree?
Back
A pedigree is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.
2.
FLASHCARD QUESTION
Front
What does it mean if a trait is recessive?
Back
A recessive trait is one that requires two copies of the allele (one from each parent) to be expressed in the phenotype.
3.
FLASHCARD QUESTION
Front
What is the genotype for a person with Cystic Fibrosis?
Back
The genotype for a person with Cystic Fibrosis is 'cc', indicating they have two recessive alleles.
4.
FLASHCARD QUESTION
Front
What is the genotype for a person who is a carrier of Cystic Fibrosis?
Back
The genotype for a carrier of Cystic Fibrosis is 'Cc', meaning they have one normal allele and one recessive allele.
5.
FLASHCARD QUESTION
Front
What does it mean if a trait is dominant?
Back
A dominant trait is one that is expressed in the phenotype even if only one copy of the allele is present.
6.
FLASHCARD QUESTION
Front
What is the genotype for a person with straight thumbs?
Back
The genotype for a person with straight thumbs can be either 'TT' (homozygous dominant) or 'Tt' (heterozygous).
7.
FLASHCARD QUESTION
Front
What is the genotype for a person with hitchhiker's thumb?
Back
The genotype for a person with hitchhiker's thumb is 'tt', indicating they have two recessive alleles.
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