This genetics review tutorial shows you a simple way to solve any monohybrid or dihybrid cross without using a punnet square. This method, unlike punnet squares, will be useful for complex crosses where drawing punnet squares is not practical.

Here's a list of problems covered in this video:

1. In Tigers, having stripes (S) is dominant to being stripe-less (s) and having tan fur (T) is dominant to having white fur (t). A female heterozygous for both traits mates with a male also heterozygous for both traits. Find the probability that they will have offspring that are strip-less and tan.
2. Wings (W) is dominant to being wingless (w) and having bar eyes and (B) is dominant to having round eyes (b). A female homozygous recessive for both traits mates with a male that is homozygous dominant for both traits. Find probability that offspring will be wingless and have round eyes.
3.In flowers, teal color (T) is dominant to navy color (t). A gardner crosses 2 plants that are heterozygous for color. What are the odds that the offspring will be navy?
4. In the cross Aa bb cc Dd X Aa Bb Cc Dd, what proportion of offspring are expected to be heterozygous for genes A and B and homozygous for genes C and D?
5. In the cross AABb X aabb What are odds offspring will be heterozygous for both traits?