Genetics Biology

posted by .

Please if anyone could help me with a few suggestions about how to answer this question.

A mutation produces a change to produce the dominant gene for continued lactase production throughout adult life. This occurs very frequently and is present in almost 100% of people in northern Europe and populations orginating from northern Europe now living else where. In people originating in most parts of the world (as well as other mammals) the recessive gene for non-persistence of lactase is most common. The dominant gene is thought to be a fairly recent mutation, orginating perhaps 6000-10 000 years ago in people developing the skills of cattle herding and dairy farming.

Suggest how this gene may have increased in Northern European populations but not in other global areas? I would be grateful for some help really really stuck on how to answer this one.

This article may help you.

http://en.wikipedia.org/wiki/Lactose_intolerance#History_of_genetic_prevalence

Thank you

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Biology

    pair up your nucleoide sequence with the mRNA sequence then you will find from the amino acids in the codons what amino acids are present in the lactase production. Each dna sequence coincincids with the appropriate mRNA sequence unless …
  2. biology

    I have been given a DNA nucleotide sequence and have established the equivalent mRNA sequence.I have then been given 2 mutations and I have worked out the new mRNA sequence but I have to suggest why it may change the function of the …
  3. Microbiology

    The diploid character of eukaryotic cells may mask the appearance of mutation since: A. this may be a frame shift B. the mutation is often reversible C. the mutation may be palindromic D. the matching chromosome may carry the dominant …
  4. Science

    Hi can you please check my work. A mutation that occurs in a diploid cell can be inherited only if A) the mutated allele is recessive. B) the mutated allele is dominant. C) the mutation occurs in a cell that produces gametes. D) the …
  5. Biology

    Please help, anyone! There's 3 types of gene mutation: substitution, deletion, and insertion, right?
  6. biology mit

    b) Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" …
  7. BIOLOGY

    b) Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" …
  8. biology

    Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" …
  9. genetics

    I PCR out a mutated gene in a patient with Lisenbee chorea (the inability to dance in a coordinated fashion) and I compare it to another patient with that same disease phenotype. One subject had a mutation on chromosome 4, and the …
  10. Biology

    Suppose a mutation occurs in the gene for a particular aminoacyl-tRNA synthetase. The mutation changes which amino acid is recognized, without affecting which tRNA molecule is recognized. How is this likely to affect protein synthesis?

More Similar Questions