Login

Join for Free!
117514 members


Genetics Dihybrid Cross

Genetics as it applies to evolution, molecular biology, and medical aspects.

Moderator: BioTeam

Genetics Dihybrid Cross

Postby jtwin2 » Wed Jul 07, 2010 2:11 am

In an organism, two separate genes influence the length of the hair. The allele for long hair, L, dominates the allele for short hair, l. The allele for hair, H, dominates the hairless allele, h. In the cross between parents of genotype LlHh and llHh, what ratio of phenotypes would you expect to see?

LlHh x llHh----> LH, Lh, lH, lh x lH, lh, lH, lh


My answer:

3:3:2 ratio (3 long hair, 3 short hair, 2 no hair)
jtwin2
Garter
Garter
 
Posts: 16
Joined: Sat Jun 19, 2010 9:39 pm

Postby JackBean » Wed Jul 07, 2010 7:17 am

question is, how will look for example LLhh?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5672
Joined: Mon Sep 14, 2009 7:12 pm

Postby jtwin2 » Thu Jul 08, 2010 1:46 am

LLhh would have no hair or long and hairless
jtwin2
Garter
Garter
 
Posts: 16
Joined: Sat Jun 19, 2010 9:39 pm


Postby JackBean » Thu Jul 08, 2010 7:02 am

that's the point, how can it have long hairs and be hairless at a time?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5672
Joined: Mon Sep 14, 2009 7:12 pm

Postby jtwin2 » Thu Jul 08, 2010 8:23 pm

IDK...I GUESS IT'S JUST HAIRLESS
jtwin2
Garter
Garter
 
Posts: 16
Joined: Sat Jun 19, 2010 9:39 pm

Postby jwalin » Wed Jul 14, 2010 2:53 am

if i aint wrong and if i remember it correctly isnt it called epistasis. i.e. the expression of 1 gene is controlled by another.
it isn't what you do that matters but it is how you do it
User avatar
jwalin
Coral
Coral
 
Posts: 438
Joined: Tue Sep 15, 2009 3:43 pm
Location: ahmedabad, gujarat, India


Return to Genetics

Who is online

Users browsing this forum: No registered users and 4 guests

cron