Patterns of Inheritance Flashcards
What is a trait?
A variation in the physical appearance of a heritable characteristic
A dominant trait is?
Unchanged in a hybridization
A recessive trait?
Disappears in the offspring of hybridization
Phenotype is?
Observable traits
Genotype is?
Underlying in genetic makeup, both physically visible and non-expressed alleles
Law of Segregation states…
that the paired unit factors must segregate equally into gametes so offspring have an equal likelihood of inheriting either factor
Law of Independent Assortment states…
Genes do not influence each other with regard to the sorting of alleles into gametes
What is linkage?
Genes that are located physically close to each other to behave independently
What is epistasis?
The interaction between genes is antagonistic, one gene makes or interferes with expression of another
Two genes located near each other on the same chromosomes are said to be:
linked
Mendel’s hybridizations may best be described as which of the following?
The matings of two true-breeding individuals that have different forms of the trait of interest.
How could you determine the distance between two genes using experimental matings?
Look for the frequency of crossing over between the genes
Johann Gregor Mendel’s work in genetics focused on traits that exhibit discontinuous variation. What kind of traits are these?
These are traits that are inherited in distinct patterns easily distinguishable among phenotypes.
Hemophilia is not seen in individuals heterozygous for the hemophilia gene. Thus, the disease is:
recessive
The modern theory that explains Mendelian inheritance is called what?
Chromosome Theory of Inheritance
