Bio exam 4 ch 13

Question 1

Genetic linkage

Answer 1

-Genes located on a chromosome fairly close together
-Don’t sort independently
-More parental combatants than recombinants

Question 2

Locus

Answer 2

Chromosomal location of a gene

Question 3

Recombination frequency

Answer 3

-Recombinants/total offspring
-If >50% they are unlinked
-Lower is linked
-0% is no cross over
-% = map units (centimorgans)

Question 4

Chromosome theory on inheritance

Answer 4

Inheritance is based on the behavior of chromosomes (bc genes are on them)

Question 5

Thomas hunt Morgan

Answer 5

-Fruit fly geneticist
-contributed to chromosome theory of inheritance and genetic linkage

Question 6

Genetic map

Answer 6

Shows map units and distance along a chromosome

Question 7

Karyotype

Answer 7

Shows all autosomes on display including any abnormal numbers and structures

Question 8

Non disjunction

Answer 8

-Homologs/sisters fail to separate during anaphase I/II
-Results in anaploidy

Question 9

Anaploidy

Answer 9

-Too few or too many copies of an individual chromosome
-Monosomy (2n-1)
-Trisomy (2n+1)

Question 10

Polyploidy

Answer 10

-More that 2 sets of chromosomes
-Triploid (3n)
-Teraploid (4n)
-Plants

Question 11

Deletion

Answer 11

Loss of a chromosome segment

Question 12

Duplication

Answer 12

Repeat of a chromosome segment

Question 13

Inversion

Answer 13

180 flip of a chromosomal segment

Question 14

Translocation

Answer 14

Piece of one chromosome segment is moved to a different chromosome