Question

probability and heredity
vectored instruction
t it tt
how many of the four offspring will be
short?
25% (1 out of 4)
50% (2 out of 4)
75% (3 out of 4)
100% (4 out of 4)

Explanation:

Step1: Analyze the genetic cross

In genetics, if we assume that the allele for short is recessive (t). Looking at the cross (assuming one parent is Tt and the other is tt, but from the given incomplete Punnett - square with two 'tt' boxes).

Step2: Calculate the proportion

Since there are 2 'tt' (recessive, short - trait - showing) genotypes out of 4 possible offspring genotypes in a typical Punnett - square - based cross (if we assume a full 4 - box Punnett - square). The proportion of short offspring is $\frac{2}{4}=0.5 = 50\%$.

Answer:

50% (2 out of 4)