HELP!! Genetics word problem (2) (not complex)?

A genetics word problem I need help with...


#1


Male Labrador crossed with Female Labrador


-yields 16 puppies


9 black fur/ black noses


3 black fur/ pink noses


3 white fur/ black noses


1 white fur/ pink noses





(this is a dihybrid corss)


A.) Assign alleles for each of the 2 characteristics


B.) Give genotypes of both parents


C.) Draw punnet square





#2..


2 mosquitos with straight stingers are mated


-yields 375 offsprings


-289 straight stinger (f1)


-86 wavy stingers (f1)





A.) What is the inheritance pattern?


B.) Genotypes of the parents? (p1)


C.) If 2 F1s with straight stingers are mated and have 180 offsprings, how many would you expect to have wavy stingers





Also try to explain c on #2 to the best of your ability





thanks!

HELP!! Genetics word problem (2) (not complex)?
Here's a Website for you. I'm too lazy to do your homework for you. Good luck!
Reply:1 a) B: black fur b: white fur


P: black nose p: pink nose


b) BbPp x BbPp


c) ....





2 a) straight stingers are wild type


b) Ss x Ss


c) ~41 bc mutation frequency = 86/(289+86)=22.9%





i hope thats right