After learning in biological anthropology class that a cleft chin is recessive and that dimples, a free-hanging earlobe, and tongue rolling are dominant, your friend tells you over dinner that she is certain she is adopted. what could have caused her to arrive at this conclusion?

Both of her parents have a cleft chin but she doesn't

Explanation:

Alleles

C -  NOT a cleft chin (dominant gene)

c - a cleft Chin (recessive gene)

Possibilities of Genotype

CC  - NOT a Cleft chin

Cc - NOT a Cleft chin (since C is dominant )

cc - a Cleft chin

Now, we both know that her parents have Cleft chin, which means that both of them could only have cc as their genotype.

This mean, if they have children ,both the father and the mother could only give c alleles. This make the possibilities of their child having a cleft chin become 100%.

If the girl does not have a cleft chin, we can say that she is 100% not the biological child of the parents.

marginal cost is a microeconomic measure that us to evaluate the extent to which the level of production of a good is sustainable in accounting, that is, to how many quantities the company plans to profit from the production of the good.

the concept of marginal cost is simple, it means the cost of producing one more item. for example, in the case of pies, the marginal cost is the cost of producing one more pie than those that have already been produced.

it is important to understand that productive activity influences marginal cost. the marginal cost of some goods can be very high, while others may be insignificant. for example, the marginal cost of producing an extra plane is very high. already the marginal cost of a water company to provide 1l more water is derisory.

in the case of pies, the cost involves the inputs, the labor and the fixed cost, which involves the fixed space of the bakery. the level of production initially has the marginal cost decreasing because there is space and manpower available. however, to produce more you have to hire more workers and buy more inputs. if physical space is limited, workers will conflict with places, inputs and their productivity will decrease, meaning there is an optimum point of production for each level of space and manpower. from this point on, the productivity of the workers will be getting smaller because of lack of space, so that the marginal cost of producing one more pie will be increasing. so, although you have not posted the chart, but if you have the answer, you can see that my explanation goes according to the marginal cost curve that will increase from the 4th pie, answer (c).

it should be d or b but i'm sure it's d