Question 1

According to Mendel’s law of segregation, what is the probability that a gamete from a heterozygous parent (Rr) will carry the dominant allele (R)?

Accepted Answer

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

Question 2

If two heterozygous pea plants (Pp) are crossed, what is the probability that their offspring will have white flowers (pp)?

Accepted Answer

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

Question 3

Which rule of probability should be used to determine the chance of obtaining a heterozygous offspring (Pp) from a monohybrid cross, considering two mutually exclusive events?

Accepted Answer

Addition rule

Question 4

In a cross between two heterozygous tall pea plants (Tt), what is the probability that the offspring will be homozygous recessive (tt)?

Accepted Answer

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

Question 5

A couple, both phenotypically unaffected by albinism (C), have a child with albinism (cc). What is the probability that their next child will also be albino?

Accepted Answer

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

Question 6

If a wingless dragon (ww) is crossed with a heterozygous winged dragon (Ww), what fraction of their offspring will be wingless?

Accepted Answer

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

Question 7

Two heterozygous dragons (Ww) are crossed. What is the probability that their offspring will be wingless (ww)?

Accepted Answer

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

Question 8

In the Punnett square below, which letter represents a homozygous dominant progeny?

Accepted Answer

A

Question 9

In pea plants, yellow seed color (Y) is dominant to green (y). If a heterozygous plant (Yy) is crossed with a homozygous recessive plant (yy), what is the probability that the offspring will have green seeds?

Accepted Answer

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

Question 10

Red eyes (R) are dominant over white eyes (r) in fruit flies. What is the expected proportion of red-eyed and white-eyed offspring from a cross between Rr and rr?

Accepted Answer

50% red, 50% white

Question 11

If you cross rr (white-eyed) with RR (red-eyed) fruit flies, what will be the eye color of all F1 offspring?

Accepted Answer

100% red

Question 12

In a cross between two heterozygous fruit flies (Rr x Rr), what is the expected ratio of red-eyed to white-eyed offspring?

Accepted Answer

75% red, 25% white

Question 13

A heterozygous parent (Aa) produces gametes. What is the probability that a gamete will carry the recessive allele (a)?

Accepted Answer

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

Question 14

If you toss two coins simultaneously, what is the probability that both will land heads up?

Accepted Answer

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

Question 15

In a monohybrid cross, what is the probability that an F2 plant will be heterozygous (Pp)?

Accepted Answer

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

Question 16

Which probability rule is used when calculating the likelihood of two independent events occurring together, such as the segregation of alleles during gamete formation?

Accepted Answer

Multiplication rule

Question 17

In mice, the agouti gene (A) produces an agouti coat, and the heterozygote (Aa) produces a yellow coat. Homozygous recessive (aa) mice die early. What is the expected phenotypic ratio of live offspring from a cross of two Aa mice?

Accepted Answer

2:1 agouti:yellow

Question 18

Imagine a locus with four alleles for fur color: Da, Db, Dc, and Dd. If you cross DaDb with DcDd, what genotype proportions would you expect in the offspring?

Accepted Answer

25% DaDc, 25% DaDd, 25% DbDc, 25% DbDd

Question 19

Which of the following best describes the probability range for any event according to probability laws?

Accepted Answer

0 to 1

Question 20

If the probability of rolling a 3 on a 6-sided die is $$\frac{1}{6}$$, what is the probability of rolling any other number?

Accepted Answer

$$\frac{5}{6}$$

Probability Laws and Mendelian Inheritance: Study Notes part 2

Guida di studio - Domande di pratica

Study guide - Flashcard