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Chapter 13: Q 13. (page 343)

By definition, a pericentric inversion includes the ________.

a. centromere

b. chiasma

c. telomere

d. synapse

Short Answer

Expert verified

The correct option is (a).

Step by step solution

01

Step 1. Introduction   

The centromere of a chromosome is always included in pericentric inversions.

02

Step 2. Explanation of Correct Option 

The order of genetic information changes when a segment of one chromosome, or a packet of genetic material, is flipped. Each chromosome has a centromere, which is a region around the center.

03

Step 3. Explanation of Incorrect Options  

Chiasma- The point of physical contact, or link, between two homologous chromosomes or chromatids is known as a chiasma.

Telomere- A telomere is a chromosome's terminal. Telomeres are non-coding DNA repeats that preserve the chromosome from harm. Telomeres shorten every time a cell divides.

Synapses are a component of the circuit that connects sensory organs in the peripheral nervous system to the brain, such as those that detect pain and touch.

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Most popular questions from this chapter

Explain how the Chromosomal Theory of Inheritance helped to advance our understanding of genetics.

If the allele encoding polydactyly (six fingers) is

dominant why do most people have five fingers?

a. Genetic elements suppress the polydactyl gene.

b. Polydactyly is embryonic lethal.

c. The sixth finger is removed at birth.

d. The polydactyl allele is very rare in the human

population.

X-linked recessive traits in humans (or in Drosophila) are observed ________.

a. in more males than females

b. in more females than males

c. in males and females equally

d. in different distributions depending on the trait

The first suggestion that chromosomes may physically exchange segments came from the microscopic identification of ________.

a. synapsis

b. sister chromatids

c. chiasmata

d. alleles

Assume a pericentric inversion occurred in one of two homologs prior to meiosis. The other homolog remains normal. During meiosis, what structure鈥攊f any鈥攚ould these homologs assume in order to pair accurately along their lengths?

a. V formation

b. cruciform

c. loop

d. pairing would not be possible
See all solutions

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