Elephant seals are a sexually dimorphic species of marine mammal that lives off the coast of California. The females, which weigh around 1000 lbs, are much smaller than the males, which may weigh up to 5000 Ibs. Suppose that scientists measured the weight of three adult female elephant seals and their female offspring. Parent Weight Offspring Weight 920 742 999 780 1014 787 Calculate the narrow sense heritability, h', of weight for female elephant seals to two decimal places. What conclusions can be drawn from these data?

Suppose that you just learned that the narrow-sense heritability of blood pressuremeasured among a group of African Americans in Detroit, Michigan, is 0.4. What doesthis heritability tell us about genetic and environmental contributions to blood pressure?

You are selecting for mice with high blood glucose levels. The population has a mean level of 50mg/100mL and you select parents that have mean level of 55mg/100mL. The offspring have a mean level of 53mg/100mL. Estimate the narrow-sense heritability of this trait from these data.

Salamanders have a male heterogametic system for sex determinations where females are ZZ and males are ZW. The allele for the color of the tail is sex linked and the red allele is found on the W chromosome and the blue allele is found on the Z chromosome. You mate a male and female and they have 3 female offspring. What is the phenotypic ratio for tail color for their offspring? Group of answer choices 2 Blue : 1 Red 0 Blue : 3 Red 1 Blue : 2 red 3 Blue : 0 Red

You have been breeding roaches in your dorm and are trying to increase the speed in your roach population. You measure speed by timing how quickly the roaches race along the linear track in your dorm room. Your current population mean is 9.3 seconds with a standard deviation of 0.32 sec. You selected the fastest 10% of your current population to be parents of the next generation. The broad and narrow sense heritability values for racing speed in roaches are 0.93 and 0.78, respectively. You wish to develop a faster population of roaches. Round all answers properly to three decimal digits. Enter all answers without units so that they will be correctly recognized by Moodle. The numerical value for the standardized selection point is The numerical value for the truncation point is seconds. The numerical value for the selection intensity is Calculate the selection differential. S = seconds. The mean of the selected parents is seconds. The response to selection is seconds. The mean of the…

Farmer John decides to increase the weight of the eggs produced by his chickens.  The average weight of his eggs is 50 grams.  He knows that the heritability of egg weight is 0.5.  He selects for chickens producing eggs that are 64 grams.  The expected average weight of the resulting eggs is:     59     57     54     55     56

Last summer you were walking in the woods when you stumbled upon a group of four tiny baby squirrels. You noticed that they all had different tail lengths. Curious, you decided to measure the tail lengths of the four squirrels. Their tail lengths were found to be: 30 mm, 38 mm, 32 mm, and 28 mm. The heritability for tails in squirrels is 0.33. (This is a fraction, not percent.) What is the variance due to the difference in environment (VE)? Round to two decimals and do not include units.

Do you think greater fleece weight is correlatedwith an increase in fiber length? Why or why not?

What is the covariance of the two traits?

Use the following Punnett Square to answer the question. T TT Tt Tt tt What is the phenotypic ratio for the offspring in this Punnett Square? O 4 tall : 0 short O 2 tall : 2 short O 1 tall: 2 medium : 1 short O 3 tall: 1 short