11. Chromosomal aberrations Flashcards
1
Q
Loss of chromosome
(2n-1 = 1n)
63XO mares,
cow,
ewe,
sow,
cat
Offspring:
- Infertile,
- underdev. Uteri, gonads,
- ovary is a mass of CT
A
Aneuploid
2
Q
Gain of 1 or chromosomes
(3n, 4n)
Offspring:
- Infertile,
- testicular hypoplasia
A
Polyploid (trisomic)
3
Q
65XXY in stallion, bull
A
Polyploid (trisomic)
4
Q
60 XX/60 XY bull -
Freemartinism
A
Mosaic
5
Q
2 or more cell population from different karyotypes
derived from 1 zygote
A
Mosaic
6
Q
Female (XX) born as twin to an apparent normal male
- 90% of females born as twins to a male cattle are freemartins
- External genitalia is that of female
- Variable development of the internal genital tracts
- Atrophic gonads resembles the testes than ovaries
A
Mosaic
7
Q
60 XX/60 XY Heifer -
Hermaphrodism
A
Chimeria
8
Q
Presence of 2 or more cell population from
different karyotypes derived from 2 or more zygotes
A
Chimeria
9
Q
(4) Chromosomal aberrations
A
- Aneuploid
- Polyploid (trisomic)
- Mosaic
- Chimeria
