/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} 13-4TYU If the DNA content of a diploid ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 13: 13-4TYU (page 268)

If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of the same cell at the metaphase of meiosis I will be

  1. 0.25x
  2. 0.5x
  3. x
  4. 2x

Short Answer

Expert verified
  1. The option 鈥�0.25x鈥� is false.
  2. The option 鈥�0.5x鈥� isfalse.
  3. The option 鈥渪鈥� is false.
  4. The option 鈥�2x鈥� is true.

Step by step solution

01

Description of meiosis and diploid cell

The cell cycle involves steps such as the G1 phase, synthesis phase, and G2 phase. The G2 phase is followed by the mitosis or meiosis phase. The meiosis process occurs in sperm cells that results in the formation of four haploid daughter cells.

02

Explanation of option (A)

After the metaphase of meiosis, the number of DNA get doubles.

The number of DNA is not reduced for one-fourth time.

Therefore, the given option is false.

03

Explanation of option (B)

The number of DNA gets doubled due to an increase in the number of pairs. The number of DNA does not get reduced to 0.5x.

The value of DNA does not get reduced by half.

Therefore, the given option is false.

04

Explanation of option (C)

The number of DNAs gets doubled in the metaphase stage. The DNA of the G1 phase will not remain the same in the metaphase of meiosis I.

The number of DNA of the same cell will not remain the same after both phases.

Therefore, the given option is false.

05

Explanation of option (D)

In general, meiosis is the process that creates four cells. The metaphase of meiosis involves the alignment of homologous pair of chromosomes on either side of the equatorial plate.

The DNA content also increases twice since there is a formation of chromosomal pairs in the metaphase.

The value of x is the initial DNA content which then increases 2x.

Therefore, the given option is true.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

What is the original source of variation among the different alleles of a gene?

A certain eukaryote lives as a unicellular organism, but during environmental stress, it produces gametes. The gametes fuse, and the resulting zygote undergoes meiosis, generating new single cells. What type of organism could this be?

Given the fact that 1 fg of DNA = 9.78 脳 105 base pairs (on average), you can convert the amount of DNA per cell to the length of DNA in numbers of base pairs. (a) Calculate the number of base pairs of DNA in the haploid yeast genome. Express your answer in millions of base pairs (Mb), a standard unit for expressing genome size. Show your work. (b) How many base pairs per minute were synthesized during the S phase of these yeast cells?

The diagram in question 6 represents just a few of the chromosomes of meiotic cells in a certain person. Assume the freckles gene is located at the locus marked F, and the hair color gene is located at the locus H, both on the long chromosome. The individual from whom this cell was taken has inherited different alleles for each gene ("freckles" and "black hair" from one parent, and "no freckles" in the gametes resulting from this meiotic event. (It will help if you draw out the rest of meiosis and label the alleles by name.) List other possible combinations of these alleles in this individual's gametes.

The Cavendish banana, the world鈥檚 most popular fruit, is threatened by extinction due to a fungus. This banana variety is "triploid" (3n, with three chromosomes) and can only reproduce through cloning by cultivators. Given what you know about meiosis, please explain how the banana's triploid numbers account for its inability to form a normal gamete. Considering genetic diversity, discuss how the absence of sexual reproduction might make this domesticated species vulnerable to infectious agents.
See all solutions

Recommended explanations on Biology Textbooks

Responding to Change

Read Explanation

Cell Cycle

Read Explanation

Reproduction

Read Explanation

Control of Gene Expression

Read Explanation

Astrobiological Science

Read Explanation

Chemistry of Life

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.