Mapping Eukaryote Chromosomes by Recombination Flashcards
Inference:
Alleles that are linked on a chromosome tend to be inherited together
Cis or trans confromation?
AB/ab
++/ab
Cis
Cis or trans conformation?
Ab/aB
+b/a+
Trans
___ causes greater % of parental genotype vs recombinant
Linkage
Recombinants are generated by ___ ___
Meitoic Crossover
What are the sites of the crossovers?
Chiasmata
Crossing over is a ___ and ___ process
Breaking and rejoining
Segregation of traits was precisely ___ with crossing over at the chromosomal level
Location is very important because of where ___ occurs
Correlated
Segregation
When does crossing over occur in Meiosis
4 chromatid stage
4 distinct gametes
Crossing over can occur at the same site in different meiosis but involve ___ chromatids
Distinct
In most eukaryotes, crossing over is necessary to successfully ___ meiosis
exit
Recombinants arise when crossover occurs between ___ ___
nonsister chromatids
When genes are on the same chromosome they are called ___
Linked
What units are used to measure genetic distances?
most common: centimorgan (cM)
or map units (m.u.)
Genes that are close together on a chromosome have more or less of a chance for recombination?
Closer - less/lower chance
Farther - more/higher chance
