Do you know genetics??????

Question

Please help me help me answer this question:

Patrick met Patti at the dance. Both of them are heterozygous for their pink body color, which is dominant over a yellow body color. Create a Punnett square to show the possibilities that would result if Patrick and Patti had children.

?????

Answer 1

Py           Py

Py          Py           Py

Py          Py           Py

wasnt exactly 2 sure on this one

Answer 2

Well, we know that heterozygous means that they have two different genes, instead of just one.  Let's call P the gene for pink body color, and p the gene for yellow body color.  PP means pink, pp means yellow, and Pp means pink (because P is dominant over p).

This means that Patrick and Patti are both Pp, genetically (one copy of the pink gene, and one copy of the yellow gene).  They're both pink, too.

Punnett Squares are hard to line up in here, so look at this link:  http://www.athro.com/evo/gen/punexam.htm...

The very first cross (BbxBb) is exactly what you want.

You'll see that they will, on average, make 1 pink child with PP, 2 pink children with Pp, and 1 yellow child with pp.

Answer 3

Heterozygous means that they're both Pp.

Let P represent the dominant pink color

Let p represent the recessive yellow color.

Setting this up will look like this

________

| PP | Pp |

---------------

| Pp | pp |

---------------

*remember: Pp is on the top and again Pp is on the left side.  Its just hard to do on here so I didn't put it.

So in total there is a 75% chance of the child having a pink body color and only a 25% chance of the child having a yellow body color.