MYTUTOR SUBJECT ANSWERS

924 views

What is sex linkage?

 

Sex linkage is a type of genetic disease, where the gene with the faulty allele is carried on the X chromosome. 

Women have 2X chromosomes whilst men only have 1. Consequently if the diseased allele is recessive, males always express it in their phenotype if it is present in their genotype (XhY) whereas women require 2 recessive alleles to show expression (homozygous XhXh). Therefore women can only be effected if both her mother and father contain the allele. Women can be carriers (XhXH). 

A key example is haemophillia. 

Katie D. Mentoring -Personal Statements- tutor, A Level Biology tutor...

2 years ago

Answered by Katie, an A Level Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

191 SUBJECT SPECIALISTS

Ollie W. GCSE Biology tutor, IB Biology tutor, A Level Biology tutor...
£24 /hr

Oliver W.

Degree: Natural Sciences (Bachelors) - Cambridge University

Subjects offered:Biology, Maths+ 4 more

Biology
Maths
Extended Project Qualification
Economics
Chemistry
-Personal Statements-

“I am third year student at the University of Cambridge studying Natural Sciences. I specialise in Neurobiology. However, I have a lot of experience in othersciences and maths, at GCSE and IB level. I studied for 5 years at Sevenoaks Sc...”

£24 /hr

Haider M.

Degree: Medicine (Bachelors) - Exeter University

Subjects offered:Biology, Physics+ 7 more

Biology
Physics
Maths
Extended Project Qualification
Chemistry
.UKCAT.
.BMAT (BioMedical Admissions)
-Personal Statements-
-Medical School Preparation-

“A bit about me I am currently in my 2nd year of medical school at the University of Exeter. I really enjoy learning about science, especially the science of health disease, and would love nothing more than to pass down this knowledge ...”

£22 /hr

Naomi S.

Degree: Medicine (Bachelors) - Trinity College Dublin University

Subjects offered:Biology, Music+ 4 more

Biology
Music
Maths
Human Biology
Chemistry
-Medical School Preparation-

“*Available to teach exam revision sessions immediately.* I'm a medical student at Trinity College Dublin. ”

About the author

Katie D.

Currently unavailable:

Degree: Biochemistry (Bachelors) - Durham University

Subjects offered:Biology, Physics+ 2 more

Biology
Physics
Chemistry
-Personal Statements-

“About me Hello! I am a Biochemistry student at Durham University and I LOVE ALL THINGS SCIENCE and I hope my tutorials will make you do too (or maybe just hate it less).  I am super friendly and I take pride in making even the most d...”

You may also like...

Posts by Katie

How do I test for the presence of a carboxylic acid?

What are the 'rules' of oscillation?

What is a chiral carbon?

What is sex linkage?

Other A Level Biology questions

Why is oxygen needed in respiration?

What is the structure and function of mitochondria?

Explain how water is re-absorbed in the kidney

how is a proton gradient set up and maintained across the inner mitochondrial membrane?

View A Level Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok