Consider a gene with four alleles a1, a2, a3, and a4. if the cross a1a2 × a3a4 yields two offspring, what is the probability that both of them have the same genotype?

There are 4 possible genotypes among any offspring (2 possible alleles from either A1 or A3, and 2 possible alles from either A2 or A4; 2*2=4), all of which are equally likely to occur with probability 1/4.

The probability that 2 offspring have the same genotype is (1/4)^2 = 1/16.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.