CH15

Question 0

Sex linked genes

Answer 0

a gene located on either sex chr

Question 1

define wild type

Answer 1

The phenotype for a character most commonly observed in natural populations

Question 2

define barr body

Answer 2

The inactive X in each cell of a female condenses into a compact object

Question 3

Define linked genes

Answer 3

Genes located on the same chr or near each other on the same chr

Question 4

Define Parental types

Answer 4

when an offspring shares the same phenotype of a parent.

Question 5

Define recombinant

Answer 5

When two non parental phenotypes are found in an offspring

Question 6

define Linkage map

Answer 6

A genetic map based on recombination frequencies

Drawing a chr and placing specific genes

Question 7

define nondisjunction

Answer 7

when the members of a pair of homologous chr do not move apart properly during meiosis I or sister chromatids fail to separate during meiosis II

Question 8

define aneuploidy

Answer 8

not true sets of chr.

Question 9

define Monosomic

Answer 9

2n - 1 chr

Question 10

define Trisomic

Answer 10

2n + 1

Question 11

Define deletion

Answer 11

Occurs when a chromosomal fragment is lost

Question 12

define Duplication

Answer 12

where the deleted fragment may become attached as an extra segment to a sister chromatid

Question 13

define inversion

Answer 13

A chromosomal fragment may also reattach to the original chr but in reverse orientation

Question 14

Define reciprocal translocation

Answer 14

where a chromosomal breakage is for the fragment to join a nonhomologous chr

Question 15

Define Down Syndrome

Answer 15

This is an aneuploid condition. occurs in 1/830 children born.
Is usually an extra 21 chr. 47 total chr.

Question 16

Define genomic imprinting

Answer 16

Variation in phenotype depending on whether an allele is inherited from the male or female