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Chapter 11: Q. 5 (page 294)

At metaphase I, homologous chromosomes are connected only at what structures?

a. chiasmata

b. recombination nodules

c. microtubules

d. kinetochores

Short Answer

Expert verified

The correct answer is option a

Step by step solution

01

Step 1. Introduction

Metaphase is one of the stage in the cell cycle in which all genomic material condense into chromosomes.

02

Step 2. The explanation for the correct option

Option a is correct because during metaphase I homologous chromosomes are aligned at the metaphase plate and are held together at the chiasmata.

03

Step 3. The explanation for the incorrect options

Option b is incorrect because during metaphase I homologous chromosomes are attached to chiasmata.

Option c is incorrect because during metaphase I microtubules attach to the fused kinetochores of the system chromatids.

Option d is incorrect because during metaphase I homologous chromosomes are held together at the chiasmata instead of kinetochores.

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Most popular questions from this chapter

Which type of life cycle has both a haploid and diploid multicellular stage?

a. asexual life cycles

b. most animal life cycles

c. most fungal life cycles

d. alternation of generations

Hydras and jellyfish both live in a freshwater lake that is slowly being acidified by the runoff from a chemical plant built upstream. Which population is predicted to be better able to cope with the changing environment?

a. jellyfish

b. hydra

c. The populations will be equally able to cope.

d. Both populations will die

Which statement best describes the genetic content of the two daughter cells in prophase II of meiosis?

a. haploid with one copy of each gene

b. haploid with two copies of each gene

c. diploid with two copies of each gene

d. diploid with four copies of each gene

Which of the following is not true in regard to crossover?

a. Spindle microtubules guide the transfer of DNA across the synaptonemal complex.

b. Nonsister chromatids exchange genetic material.

c. Chiasmata are formed.

d. Recombination nodules mark the crossover point.

What is a likely evolutionary advantage of sexual reproduction over asexual reproduction?

a. Sexual reproduction involves fewer steps.

b. There is a lower chance of using up the resources in a given environment.

c. Sexual reproduction results in variation in the offspring.

d. Sexual reproduction is more cost-effective.
See all solutions

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