Gene Mapping Flashcards
There is _______ between the two (2) chromosomes if they are so physically associated to each other making them physically impossible to exchange their segments with each other
complete linkage interaction
High Interference =
High (mutant) Recombinant DNA type
There are two (2) types of linkage:
(– cross over of DNA)
- Complete Linkage
- Incomplete Linkage
Low Interference =
High (wild) Parental DNA type
if the interference has 0.49 or lower, there is
low interference
a principle in genetics that genes that has cross-over will have less chance of having another cross-over in the gene prior and after the cross-over.
interference
There is _______ between the two (2) chromosomes if there are crossing overs that occur during meiosis that result in different genes in offspring.
incomplete linkage interaction
During _______ (_______), there is a DNA activity wherein closely related chromosomes that are paired together develop a chiasma (chiasmata pl.) or linkage.
meiosis 1
prophase 1
T or F
In incomplete linkage interaction, all offspring inherit the same genes with their parents without alteration.
NO RECOMBINANT TYPE
False
Gene Mapping: Identification of Data
arrange in order
A. It is always the parental strand that has highest frequency.
B. Analyze the correct sequence of gene by comparing parent and double-crossover strands.
C. Determine the total number of samples. Add all frequencies.
D. It is always the double-crossover strand that has lowest frequency.
C
A
D
B
if the interference has 0.51 or higher, there is
high interference
During Meiosis I (Prophase I), there is a DNA activity wherein closely related chromosomes that are paired together develop a _______ or linkage.
chiasma or chiasmata pl.
(linkage)
T or F
In complete linkage interaction, 50% will inherit their mother’s genes 50% will inherit their father’s genes
True
The pairing of homologous (partner) chromosomes results in exchange of DNA material between parental and maternal DNA resulting into different set of genes in their offspring.
DNA Recombination
interference formula
Interference = 1 – Coefficient of Crossover
