Answer: pink-purple
Explanation: Biuret solution is used to identify the presence of protein. Biuret reagent is a blue solution that, when it reacts with protein, will change color to pink-purple.
This would be a recessive disease.
Father is dd
Mother is Dd (has to be because one child has the disease)
Parents cross is dd x Dd which gives rise to Dd (0.5) and dd (0.5). Each time they have a child they have a 50% chance of the child having the disease. In their case, only one of their 3 children is dd. The others though are carriers!
The only possible phenotype is large ears.
This is because using a punnet square reveals that each option has a dominant allele of large ears, leaving no room for the recessive trait of small ears.
Hope this helps!
Enzymes are proteins that speed up chemical reactions without being used up.
B. The ability to respond to the environment good decision
