In order to determine the expected average offspring length, what do you multiply with your heritability

Complete question:

In a population of toads, the average body length is 30mm. Body length is variable and the narrow sense heritability for body length is 0.1 for this population. You cross a male of 20mm with a female of 22mm. In order to determine the expected average offspring length, what do you multiply with your heritability?

30mm 9mm 0.1 8mm -9mm -0,5

The correct option is -9mm

In order to know the expected average offspring length, OABL, we need to multiply the selection differential, SD ( -9mm) with narrow-sense heritability, h² (0.1).

Explanation:

Available data:

the average body length, ABL, is 30mmthe narrow-sense heritability, h², for body length is 0.1male of 20mmfemale of 22mm

To answer this question, we need to remember how can we calculate the selection differential and the heritability in the narrow sense.

We can get the selection differential, SD, by getting the difference between the mean value of a population length, ABL, and the mean value of the parents of the next generation, PABL. So, in this example the selection differential is:

SD = (20mm + 22mm)/2 - 30mm

SD = 21 mm - 30mm

SD = - 9mm

The heritability in the narrow sense, h², for body length in the population is

h² = body lengths of the offspring average/selection differential

But we already know the value of h². And we want to know the body length of the offspring. So we just need to clear the following equation.

OABL = ABDL + h² ( PABL - ABL)

where,

offspring average body lengths = OABLpopulation average body length = ABL = 30mmparents average body length = PABL = 22mmSelection diferential = SD = -9mmnarrow sense heritability = h² = 0.1

OABL = ABDL + h² ( PABL - ABL)

OABL = ABDL + h² ( SD)

OABL = 30mm + 0.1 ( -9mm)

OABL = 30mm + (-0.9 mm)

OABL = 21 mm

In order to know the expected average offspring length, OABL, we need to multiply the selection differential, SD ( -9mm) with narrow-sense heritability, h² (0.1).  

42

Step-by-step explanation:

Since 70% is just 70/100 or 0.70, you would multiply it by the 60 coffee mugs to find out how many of the coffee mugs are dirty.

Work:

60 * 0.70 = 42

This means that 42 of the coffee mugs are dirty out of the 60 coffee mugs.