A little help with Biology concerning Genetics and punnet squares?

Posted on 2013-11-22 18:10:00 in Biology by CEYLINGE

The following rose crosses were performed. In the first, a red rose is crossed with a white rose. Red is dominant. 26 seeds are planted and grow into 11 red flower roses and 15 white flowered roses. A second cross is performed in which the original red rose (1st cross) is crossed with a known heterozygous red flowered rose. 60 seeds are collected. Show both punnet squares.



a. What is the genotype of the red rose in the first cross?



b. If the first cross was repeated a second time and 20 seeds are produced, how many are expected to be white? Red?



c.How many seeds of the second cross should produce red flowers? White flowers?



An explanation is very much appreciated, so I can understand this material

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