Hello, 

These are the eligibility criteria for M.Sc Zoology :

• You must have passed 10+2 from a recognised school or board in India.
• You must have passed B.sc/B.sc (Hons) Zoology with 50% marks in aggregate from a recognised university.
• Candidates who have passed B.sc/ B.A in Medical and Allied Medical Sciences/ Biosciences/ Life sciences with minimum 50% marks in aggregate from a recognised university are also eligible to apply.

For more information please go through the following link 

https://collegedunia.com/courses/master-of-science-msc-zoology

Hope this helps .....