Question 1

Which of the following best describes the difference between a gene and an allele?

Accepted Answer

A gene is a segment of DNA that codes for a trait, while an allele is a variant form of that gene.

Question 2

In a monohybrid cross between two heterozygous purple-flowered pea plants (Pp x Pp), what is the expected phenotypic ratio of the offspring?

Accepted Answer

3 purple : 1 white

Question 3

If a pure-breeding tall, purple-flowered plant (TTPP) is crossed with a pure-breeding short, white-flowered plant (ttpp), what will be the genotype of the F1 generation?

Accepted Answer

TtPp

Question 4

Which of the following best defines a phenotype?

Accepted Answer

The observable physical or physiological traits of an organism

Question 5

A heterozygous individual is also known as a:

Accepted Answer

Carrier or hybrid

Question 6

In a dihybrid cross (PpTt x PpTt), what is the probability of obtaining an offspring that is homozygous recessive for both traits?

Accepted Answer

$$\frac{1}{16}$$

Question 7

Which of the following statements about dominant and recessive alleles is correct?

Accepted Answer

A dominant allele masks the effect of a recessive allele in a heterozygote.

Question 8

If the probability of inheriting allele A from one parent is $$\frac{1}{2}$$ and the probability of inheriting allele B from the other parent is $$\frac{1}{2}$$, what is the probability of inheriting both alleles (A AND B)?

Accepted Answer

$$\frac{1}{4}$$

Question 9

Which of the following best describes a homozygous genotype?

Accepted Answer

An organism with two identical alleles for a gene

Question 10

A woman who is heterozygous for an X-linked trait has children with a man who does not carry the trait. What is the probability that their son will express the X-linked trait?

Accepted Answer

$$\frac{1}{2}$$

Question 11

Which of the following is the correct sequence of steps when using a Punnett square to predict offspring genotypes?

Accepted Answer

Determine parent genotypes, determine gametes, fill in Punnett square, analyze offspring genotypes

Question 12

If two carriers (heterozygotes) for a recessive genetic disorder have a child, what is the probability that the child will be affected by the disorder?

Accepted Answer

$$\frac{1}{4}$$

Question 13

Which of the following best explains why probabilities in genetics must add up to 1?

Accepted Answer

Because all possible outcomes together represent the entire set of possibilities

Question 14

A plant with genotype PpTt is crossed with another plant with the same genotype. What is the probability that an offspring will have the genotype pptt?

Accepted Answer

$$\frac{1}{16}$$

Question 15

Which of the following is an example of a real-world application of Mendelian genetics?

Accepted Answer

Predicting the likelihood of a child inheriting cystic fibrosis

Mendelian Genetics and Meiosis Recap: Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드