Brain Teasers
Brain Teasers Trivia Mentalrobics Games Community
Personal Links
Submit a Teaser
Your Favorites
Your Watchlist
Browse Teasers
All

Cryptography
Group
Language
Letter-Equations
Logic
Logic-Grid
Math
Mystery
Optical-Illusions
Other
Probability
Rebus
Riddle
Science
Series
Situation
Trick
Trivia

Random
Daily Teasers
Search Teasers

Advanced Search
Add to Google Add to del.icio.us

More ways to get Braingle...

Kitties!

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#29006
Fun:*** (2.5)
Difficulty:*** (2.28)
Category:Science
Submitted By:bigSWAFF_69_Aus******

 

 

 



A female purebred white cat and a male purebred black cat had a litter of 12 kittens. Out of the 12 kittens, all but 3 were black. How many female kittens were there?



Answer

9

x= recessive: white
X= dominant: black

A purebred, female, white cat would have the alleles xx for fur color (white). A purebred, male, black cat would have the alleles YX (black).
The possible allele combinations for offspring are as follows (set up a Punnett Square)

Xx......Yx
Xx......Yx

Every female kitten would be black, with a recessive allele for white fur. Every male kitten would be white. There are 9 black kittens, so that means there are 9 female kittens.

Hide




What Next?

  
  

See another brain teaser just like this one...

Or, just get a random brain teaser

If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.

 






Back to Top
   



Online Now: 11 users and 429 guests

Copyright © 1999-2014 | Updates | FAQ | RSS | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise

Custom Search





Sign In A Create a free account