What is Linkage?

Linkage occurs when the genes for two different characteristics are found on the same chromosome. This means that they do not independently assort during metaphase one of meiosis and so pass into gametes together; at fertilisation they then pass into the offspring and are inherited together. This reduces the possible allele combinations and so reduces genetic variation in the population. The majority of F2 organisms inherit the same combinations of characteristics as the F1 generations, as the only potential variation comes about as a result of crossing over events (which are comparatively rare). This should not be confused with Sex Linkage.

MG
Answered by Megan G. Biology tutor

30323 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Define homeostasis and explain it in the context of blood glucose concentration.


Explain how the potential difference across the neuronal cell membrane changes during conduction of an action potential


How is heart rate controlled?


Using the Hardy Weinberg principle, calculate the frequency of the heterozygous genotype in the population if the frequency of the dominant allele p is 0.864. Express your answer as a percentage of the population.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences