Top answers

In the case of cystic fibrosis, two parents don't suffer from the disease but both carry the recessive cystic fibrosis allele. What is the probability that a child of the parents will suffer from cystic fibrosis.

25%. Draw a punnet square to find this: Write in the alleles for the parents along the top and side of the square, then match up the possible allele combinations for the children inside the square. Cystic fi...
LD
Answered by Louis D. • Biology tutor
4965 Views

What is a food chain we might see in the UK?

A food chain demonstrates what different species of animals present in an ecosystem eat, and are eaten by. The start of the food chain is a producer - an organism which makes food. This is generally a plant,...
CT
Answered by Caroline T. • Biology tutor
12816 Views

What are the distinguishing features of a mammal compared to other classes of animals?

All classes of vertebrates have their own distinguishing features that we can use to identify if an animal is indeed a mammal or not. The main classes of vertebrates can be simpified into mammals, fish, amph...
JA
Answered by Jamal A. • Biology tutor
8089 Views

1. Describe how different parts of the human digestive system help to break down molecules of fat so that they can be absorbed into the body.

Fat is first processed by mechanical breakdown in the mouth through chewing and in the stomach through its ‘churning’ action. Lipase, an enzyme produced in the pancreas, converts fat in the small intestine i...
RL
Answered by Ruby L. • Biology tutor
37467 Views

What are the functions of white blood cells?

The main role of white blood cells is to protect the body against invasion by disease-causing microorganisms (pathogens), such as bacteria or viruses. They do this in 2 main ways: phagocytosis and antibody p...
NK
Answered by Neha K. • Biology tutor
36114 Views