Campbell Biology Chap 14 Flashcards
What is true breeding
an organism that consistently passes on a specific phenotypic trait to its offspring, meaning that when self-fertilized or bred with another true-breeding organism with the same trait, all offspring will exhibit the same characteristic
What is hybridization in a breeding environment
mating, or crossing, of two true-breeding
varieties
What is the P generation in a breeding environment
The true breeding parents
What is the F1 Generation in a breeding environment
The offspring of the true breeding paents
What is the F2 generation in a breeding environment
The offspring of the F1 Generation
What was the blending hypothesis in the 1800s which turned out to be false
heredity of the plants would cause a mix of the two traits of the parents, resulting to a complete mix over time, for example a purple and a white flowered plant would have something intermediate in theory.
Traits can ______ generations
Skip
What are alleles
a variant form of a gene, or a different version of a DNA sequence at a specific location on a chromosome
In a pea plant, what are the different alleles for their flower color
Purple or White
how many alleles of a gene in a diploid organism
2
where are the alleles sourced in a diploid organism
One from each parent
Can alleles be the same
Yes
What is a genetic locus
the specific physical location on a chromosome where a particular gene is found
What is the Dominant allele
When a genetic locus has 2 different alleles, the dominant gene determines the appearance of the organism
What is the Recessive allele
When a genetic locus has 2 different alleles, the recessive gene has no noticeable effect determining appearance of the organism
