Podcast
Questions and Answers
What is a genetic carrier?
What is a genetic carrier?
What is a sex linked gene?
What is a sex linked gene?
A trait associated with a gene that is carried only by the male or female parent.
In mammals, one copy of the X chromosome in each female cell is _____ to prevent excess gene products.
In mammals, one copy of the X chromosome in each female cell is _____ to prevent excess gene products.
inactivated
What does incomplete dominance refer to?
What does incomplete dominance refer to?
Signup and view all the answers
What is codominance?
What is codominance?
Signup and view all the answers
What is a polygenic trait?
What is a polygenic trait?
Signup and view all the answers
What is a linkage map?
What is a linkage map?
Signup and view all the answers
What is a pedigree?
What is a pedigree?
Signup and view all the answers
What is a karyotype?
What is a karyotype?
Signup and view all the answers
Study Notes
Genetic Concepts
-
Carrier: An individual who inherits a recessive allele for a genetic trait but does not exhibit the associated phenotype or symptoms.
-
Sex-linked Gene: Genes located on sex chromosomes; for instance, colorblindness in humans is linked to the X chromosome, affecting only males and females differently.
-
X Chromosome Inactivation: A mechanism in females that inactivates one of the two X chromosomes in each cell to balance gene expression between sexes, as males have only one X chromosome.
-
Incomplete Dominance: A genetic scenario where one allele is not completely dominant over another, leading to an intermediate phenotype rather than a straightforward dominant-recessive expression.
-
Codominance: Occurs when both alleles of a gene are expressed, resulting in a phenotype that displays characteristics of both alleles, rather than one masking the other.
-
Polygenic Trait: Traits influenced by multiple genes, exhibiting continuous variation; examples include height and skin color, which do not fall into simple categories.
Genetic Mapping and Analysis
-
Linkage Map: Tool used to determine the relative positions of genes on a chromosome based on their inheritance patterns; reflects how frequently two gene loci are inherited together rather than exact physical distances.
-
Pedigree: A family tree representation showing genetic relationships and inheritance patterns of traits or diseases across generations, highlighting carriers and affected individuals.
-
Karyotype: The complete set and structured appearance of chromosomes in an organism's cells, essential for identifying chromosomal abnormalities and understanding genetic makeup.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore key vocabulary terms from Chapter 7 of genetics, focusing on essential concepts like 'carrier' and 'sex linked gene'. These flashcards will enhance your understanding of genetic inheritance and associated traits.