00:01
In this question, we're told that the heterozygous pea plant that's tall with yellow seeds, the big t, little t, big, g, little g, is allowed to self -fertilized, so we cross it with the exact same.
00:12
And we want to know the probability that an offspring will be either tall with yellow or tall with green or dwarf with yellow.
00:21
So tall with yellow would be big t underscore and then little g, little g, little g.
00:27
Tall with green would be the same thing except big t underscore big g underscore and then finally dwarf with yellow seeds would be little t little t and then big or sorry and then little t little g or little g and it can be any of these and thus using the sum rule we're going to add up the individual probabilities for each of these and the way that we sort of find the probability for each of these is going to be by looking at the gametes one by one or the alleles one by one.
01:00
So for big t underscore, we just need a big t and knowing that it's a one to two to one ratio in a double heterozygous case, we would know that the big t, big t, big t, little t is two, and then little t is two, and then little t is one, which gives us a three and four probability of getting the big t allele.
01:16
Looking at the little g allele, it would just be the one in four...