50 % of the offspring are expected to have roan coat If two roan cattle were crossed.
Explanation:
In codominance both alleles from the parents are expressed and the phenotype is different from the parents.
Roan is a type of coat colour where there is even occurrence of coloured and white hairs on the coat of the cattle.
The genotype of Roan cattle is CRCW (CR red, CW-white)
If two roan cattles are mated:
CRCW X CRCW
punnet square shows:
CR CW
CR CRCR CWCR the genotype ratio = 1:2:1
CW CWCR CWCW phenotype ratio = 1:2:1
1 pure white cattle
1 pure red cattle
2 roan cattle
