BIO 207 - Midterm 3 UPDATED Exam
Questions and CORRECT Answers
do linked genes behave in a mellian manner? - CORRECT ANSWER - no
are genes that are far apart more likely to cross over? - CORRECT ANSWER - yes
ways that recombination can occur - CORRECT ANSWER - crossing over, independent
assortment, random fertilization
what does vg mean (note the lack of superscript) - CORRECT ANSWER - mutant
vestigial allele
Synteny - CORRECT ANSWER - two or more genes are located on the same chromosome
and are physically linked
syntenic blocks - CORRECT ANSWER - evolutionary conserved regions of chromosomes
that display the same order of genes in different species
why might recombination frequency not reflect the true gene distances? - CORRECT
ANSWER - -crossing over is reduced near the centromere
-cross over in one area tends to interfere with additional cross overs in that area
-max of 50 cm measurements
3 point test cross parents - CORRECT ANSWER - fully recessive male and a triple
heterozygote female
how do you correct for double crossovers? - CORRECT ANSWER - double the two
parental populations that are only parental for the two outside genes
Questions and CORRECT Answers
do linked genes behave in a mellian manner? - CORRECT ANSWER - no
are genes that are far apart more likely to cross over? - CORRECT ANSWER - yes
ways that recombination can occur - CORRECT ANSWER - crossing over, independent
assortment, random fertilization
what does vg mean (note the lack of superscript) - CORRECT ANSWER - mutant
vestigial allele
Synteny - CORRECT ANSWER - two or more genes are located on the same chromosome
and are physically linked
syntenic blocks - CORRECT ANSWER - evolutionary conserved regions of chromosomes
that display the same order of genes in different species
why might recombination frequency not reflect the true gene distances? - CORRECT
ANSWER - -crossing over is reduced near the centromere
-cross over in one area tends to interfere with additional cross overs in that area
-max of 50 cm measurements
3 point test cross parents - CORRECT ANSWER - fully recessive male and a triple
heterozygote female
how do you correct for double crossovers? - CORRECT ANSWER - double the two
parental populations that are only parental for the two outside genes
