AGB 121: Principles of Animal Genetics and Population Genetics (2+1)

CHROMOSOME MORPHOLOGY OF DIFFERENT LIVESTOCK SPECIES

S. No.	Species	Diploid No. (2n)	AC	MC	SMC	TC	X	Y
1	Cattle (Bos indicus)	60	29	-	-	-	MC	AC (Small)
2	Cattle (Bos taurus)	60	29	-	-	-	MC	AC
3	River Buffalo	50	19	-	5	-	AC	AC
4	Swamp Buffalo	48	18	1	4	-	AC	AC
5	Goat	60	29	-	-	-	AC (2nd to 3rd longest)	MC (small)
6	Sheep	54	23	3	-	-	AC (longest)	MC (Small)
7	Pig	38	6	5	5	2	MC	MC
8	Dog	78	38	-	-	-	SMC (largest)	MC (smallest)
9	Cat	38	2	16	-	-	MC	MC
10	Horse	64	18	-	13	-	SMC	AC
11	Donkey	62	7	-	23	-	SMC	MC

Note: AC - Acrocentric, MC - Metacentric, SMC - Small Metacentric, TC -Telocentric, X – Chromosome, Y – Chromosome.

• Mosaic : If there are two or more populations of cells derived from a  single zygote which differ in chromosome number and / or structure, the condition is known as mosaicism and the individual is a mosaic.
• Chimera : If there are two or more populations of cells derived from two or more zygotes, which differ in chromosome number and / or structure, the condition is known as chimerism, and the individual is a chimera.