EOC REVIEW: Flashcards
A monohybrid cross follows how many traits?
One
What can karyotypes be used for?
To identify chromosomal abnormalities, specifically due to nondisjunction
What is a chiasma?
Location on the chromosome where crossing over occurs.
An allele that is expressed if there is one or two present
Dominant
How many copies of the chromosomes are found in a diploid cell?
1 (46 total in humans)
How many copies of the chromosomes are found in a haploid cell?
2 (23 total in humans)
The first generation of offspring are known as?
F1
Type of cells produced during meiosis
Gametes, haploid, sex cells
What is a tetrad?
A pair of homologous chromosomes
Who is the father of genetics?
Gregor Mendel
What phonotypic ration can you expect from a dihybrid cross of 2 heterozygous parents?
9DD: 3Dr: 3rD: 1rr
What is incomplete dominance?
The blending of traits in a heterozygous genotype.
How can genes be linked?
They’re on the same chromosome. Closer together = more linked
What is codominance?
When two alles are equally expressed in a heterozygous phenotype
In sex linked inheritance, a dominate father will always make a ______ daughter.
dominant
What is the pheotypic ratio of a monohybrid cross of two heterozygous individuals?
3 dominant: 1 recessive
What is a locus (loci)?
Location on the chromosome where a gene is located
What is an allele that is only expressed if there are two present?
reccessive
What is polygenic inheritance?
Traits that are controlled by two or more genes
In pedigrees, females are shown with a __________ shape and males are shown with a ___________ shape.
Circle, square
What is made during crossing over?
Recombinant DNA
In sex linked inheritance, a recessdive mother will always make a _________ son
Recessive
When crossing over occurs
Prophase 1
An individual that possesses an allele that they do not display is known as a
carrier
