A population of 200 mice contains 168 brown mice. Brown is dominant to gray. How much of the population will be heterozygous?

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

How does the study of genetic disorders such as pku biologists understand normal alleles?

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called