BIOL 4003 Module 4 questions with
complete answers passed
Genetic linkage - correct answer ✔✔ tendency for genes located close together on the same
chromosome to be transmitted as a unit
Crossing over - correct answer ✔✔ Process in which homologous chromosomes exchange
portions of their chromatids during meiosis.
May produce recombinant genotypes
How does linkage affect the outcomes of two- and three-factor crosses? - correct answer ✔✔
Makes it much more likely for offspring to have genotypes/phenotypes of parents, instead of
recombinant
Chi square test formula - correct answer ✔✔ X^2=(sigma) (o-e)^2/e
How use Chi square to evaluate if 2 genes are linked - correct answer ✔✔ Hypothesis: Genes
are independent
Can prove otherwise if X^2 leads to small P value
Degrees of freedom: either phenotypes-1 or recombinant/nonrecombinant-1
Genetic map - correct answer ✔✔ ordered list of the genetic loci along a particular
chromosome
Use testcross data to construct a linkage map - correct answer ✔✔ -3 traits: double crossover
will occur least, will show which gene is in the middle
-From there, calculate map distance
complete answers passed
Genetic linkage - correct answer ✔✔ tendency for genes located close together on the same
chromosome to be transmitted as a unit
Crossing over - correct answer ✔✔ Process in which homologous chromosomes exchange
portions of their chromatids during meiosis.
May produce recombinant genotypes
How does linkage affect the outcomes of two- and three-factor crosses? - correct answer ✔✔
Makes it much more likely for offspring to have genotypes/phenotypes of parents, instead of
recombinant
Chi square test formula - correct answer ✔✔ X^2=(sigma) (o-e)^2/e
How use Chi square to evaluate if 2 genes are linked - correct answer ✔✔ Hypothesis: Genes
are independent
Can prove otherwise if X^2 leads to small P value
Degrees of freedom: either phenotypes-1 or recombinant/nonrecombinant-1
Genetic map - correct answer ✔✔ ordered list of the genetic loci along a particular
chromosome
Use testcross data to construct a linkage map - correct answer ✔✔ -3 traits: double crossover
will occur least, will show which gene is in the middle
-From there, calculate map distance
