Q: Which equation represents the transition from diploid to haploid in sexual life cycles?

$$2n \xrightarrow{\text{meiosis}} n$$

Question 1

Which process during meiosis is primarily responsible for generating new combinations of alleles in offspring?

Accepted Answer

Crossing over

Question 2

In Mendel’s pea plant experiments, what was the expected phenotypic ratio in the F2 generation when crossing two heterozygous purple-flowered plants ($$Pp 	imes Pp$$)?

Accepted Answer

$$3:1$$

Question 3

Which of the following best describes the difference between mitosis and meiosis?

Accepted Answer

Mitosis produces two genetically identical diploid cells, while meiosis produces four genetically distinct haploid cells.

Question 4

A cat that is heterozygous for short hair ($$Hh) $$and for white fur ($$Ww) $$mates with a heterozygous white cat with long hair ($$wwHh). $$What is the probability a kitten will have short, colored fur?

Accepted Answer

$$1/8$$

Question 5

In Drosophila, long wing ($$L) is $$dominant to short wing ($$l). $$Two long wing flies produce 49 short wing and 149 long wing offspring. What proportion of the long wing offspring should be heterozygous?

Accepted Answer

$$2/3$$

Question 6

Which term describes the physical appearance of a trait, such as flower color or wing length?

Accepted Answer

Phenotype

Question 7

If two heterozygous short-haired cats ($$Hh 	imes Hh) $$mate, what is the probability that a given kitten will have long hair?

Accepted Answer

$$25\%$$

Question 8

Which of the following statements about dominance is correct?

Accepted Answer

Dominance determines which allele is observable in a heterozygote.

Question 9

In plants and some algae, which process produces spores?

Accepted Answer

Meiosis

Question 10

Which life cycle is characterized by a dominant haploid phase and gametes produced by mitosis?

Accepted Answer

Zygotic meiosis

Question 11

A cat with white fur (dominant) who had a parent with colored fur mates with a colored fur cat. What proportion of kittens are likely to have white fur?

Accepted Answer

$$1/2$$

Question 12

Which of the following is NOT a common pitfall when using Punnett squares?

Accepted Answer

Using Punnett squares for non-genetic traits

Question 13

Which equation represents the transition from diploid to haploid in sexual life cycles?

Accepted Answer

$$2n \xrightarrow{	ext{meiosis}} n$$

Question 14

Which of the following best describes independent assortment?

Accepted Answer

The random distribution of maternal and paternal chromosomes to gametes during meiosis

Question 15

Which of the following is a segment of DNA containing instructions for a specific protein?

Accepted Answer

Gene

Question 16

If the environment changes suddenly, what is the evolutionary advantage of genetic variation in a population?

Accepted Answer

Some individuals may be better suited to survive and reproduce in the new environment.

Question 17

Which of the following is true about gametes in sexual reproduction?

Accepted Answer

Gametes are always haploid.

Question 18

Which of the following best describes a heterozygous genotype?

Accepted Answer

Having different alleles at the gene copies on homologous chromosomes

Question 19

Which of the following is a real-world example of Mendelian inheritance?

Accepted Answer

Inheritance of seed color in pea plants

Question 20

Which statement best explains why Mendel’s findings were ignored for about 35 years?

Accepted Answer

The scientific community did not recognize the significance of his experiments at the time.

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