Three Loci, Mitochondrial Malate Dehydrogenase That Forms a and B

question 25

Essay

Three loci, mitochondrial malate dehydrogenase that forms a and b (MDHa, MDHb),
glucouronidase that forms 1 and 2 (GUS1, GUS2), and a histone gene that forms + and - (H+, H -) are located on chromosome 7 in humans. Assume that the MDH locus is at position 35, GUS at position 45, and H at position 75. A female whose mother was
homozygous for MDHa, GUS2, and H+ and whose father was homozygous for MDHb, GUS1, and H - produces a sample of 1000 egg cells. Give the genotypes and expected numbers of the various types of cells she would produce. Assume no chromosomal
interference.

---

Definitions:

Economic Profits

The total revenue of a business minus its explicit and implicit costs; a measure of incremental gain over the total costs, including opportunity costs.

Supply Curve

A graph showing the relationship between the price of a good and the quantity supplied by producers.

Long-run Equilibrium

A state in which all factors of production and outputs are variable, allowing for the adjustment of all inputs, leading to a balanced economic condition over time.

Zero Economic Profits

Occurs when a firm earns just enough revenue to cover its total costs, including opportunity costs, but no more.