Question

which of the following conditions could not be used in an if statement?
○ alelle0.isupper()
● alelle0.isupper() and allele1.isupper()
○ allele0.isupper() or allele1.isupper()
○ allele0 and allele1.isupper()

question: 2
how does an if statement differ from an if/else statement?
○ an if/else statement only does something if a condition is false.
● an if statement only does something if a condition is true.
○ an if/else statement only makes a decision between more than 2 options.
○ an if statement only makes a decision between more than 2 options.

Explanation:

In Python, the if statement executes a block of code if a condition is True. The if/else statement executes one block if the condition is True and another block if it is False.

• For the first question: In Python, the and operator requires both operands to be True for the overall condition to be True. The or operator requires at least one operand to be True. The isupper() method checks if a character is uppercase. The expression allele[0] and allele[1].isupper() is incorrect syntax in the context of an if statement condition as it tries to use and in an improper way (it's not comparing two boolean - like results correctly).
• For the second question: An if statement executes its indented block only when the condition is True. An if/else statement has two branches - one for when the condition is True and one for when it is False.

Answer:

For the first question: The condition that could NOT be used in an if statement is allele[0] and allele[1].isupper().
For the second question: An if statement only does something if a condition is true.