Double-Strand Breaks (DSB) Are Needed for Crossing-Over to Occur in Meiosis

question 6

Multiple Choice

Double-strand breaks (DSB) are needed for crossing-over to occur in meiosis. In a pair of homologous chromosomes, how many chromatids require a DSB in order for crossing over to occur?

• A) 1
• B) 2
• C) 3
• D) 4

---

Definitions:

Unlimited Wants

Refers to the insatiable desire of consumers to possess goods and services that provide utility, exceeding the resources available to fulfill them.

Fresh Water

Fresh water is water with a low salt concentration, found in rivers, lakes, streams, and underground aquifers, essential for drinking, agriculture, and industry.

Scarce Resource

A resource that is limited in availability and can be used up or depleted, making it valuable and subject to economic study for optimal use.

Unlimited Wants

The economic concept that humans have endless desires for goods and services.