11.3 Bio Flashcards
(14 cards)
What is a pedigree chart?
A diagram that shows the occurrence of a genetic trait in several generations of a family.
In a pedigree, what does a filled circle represent?
An affected female.
What is the primary purpose of constructing a pedigree?
To analyze the inheritance patterns of traits.
Fill in the blank: In sex-linked traits, the gene is located on the _____ chromosome.
X
What is the difference between autosomal and sex-linked inheritance?
Autosomal inheritance involves genes located on non-sex chromosomes, while sex-linked inheritance involves genes located on sex chromosomes.
Multiple Choice: Which of the following can be a characteristic of sex-linked traits? A) More common in males B) More common in females C) Equal distribution
A) More common in males
What does a horizontal line connecting a male and female in a pedigree indicate?
A marriage
True or False: A recessive trait can only be expressed if both alleles are recessive.
True
Short Answer: What does the term ‘carrier’ mean in genetics?
An individual who has one copy of a recessive allele for a trait but does not express the trait.
Fill in the blank: Affected individuals in a pedigree are typically represented by _____ symbols.
filled
Multiple Choice: Which of the following is NOT a common notation used in pedigrees? A) Squares for males B) Circles for females C) Triangles for carriers
C) Triangles for carriers
What is the significance of the proband in a pedigree analysis?
The proband is the individual through whom the pedigree is initiated.
True or False: Females can be affected by X-linked recessive disorders.
True
What does the term ‘genetic counseling’ refer to?
The process of advising individuals about the genetic risks of inherited conditions.
