The effects of exposing eukaryotic cells to radioactive thymidine during the S or synthesis phase of interphase, on sister chromatids of the duplicated chromosome at metaphase of the mitosis, after the second round of DNA (deoxyribonucleic acid) replication in a medium free of radioactive labels. Introduction: DNA of eukaryotic chromosomes replicate semi-conservatively. This was illustrated by labeling the cells with radioactive thymidine during the S-phase and then grown in the absence of radioactive thymidine. The cell cycle was then studied. The cell cycle consists of interphase and mitotic phase. DNA is synthesized during the S-phase of interphase whereas the mitotic phase is the divisional phase and consists of prophase, metaphase, anaphase, and telophase.

Question

Want to see the full answer?

Answer 1

Question

Chapter 14, Problem 12TYK

Summary Introduction

To review:

The effects of exposing eukaryotic cells to radioactive thymidine during the S or synthesis phase of interphase, on sister chromatids of the duplicated chromosome at metaphase of the mitosis, after the second round of DNA (deoxyribonucleic acid) replication in a medium free of radioactive labels.

Introduction:

DNA of eukaryotic chromosomes replicate semi-conservatively. This was illustrated by labeling the cells with radioactive thymidine during the S-phase and then grown in the absence of radioactive thymidine. The cell cycle was then studied. The cell cycle consists of interphase and mitotic phase. DNA is synthesized during the S-phase of interphase whereas the mitotic phase is the divisional phase and consists of prophase, metaphase, anaphase, and telophase.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

List in each blank the description of events associated with each stage of mitosis in addition to the preparatory stage Interphase. Some events and structures occur only in plant cells and some in animal cells. Mark these events in the list with an asterisk.

In the tracking chromosomal DNA movement through mitosis experiment, how many chromosomes did each of your daughter cells contain? Why is it important for each daughter cell to contain information identical to the parent cell? How often do human skin cells divide? Why might that be? Compare this rate to how frequently human neurons divide. What do you notice?

Draw and label G1 and G2 stages of interphase and each stage of mitosis (in order) for a cell that has two large and two small chromosomes, 2n=4. For unreplicated chromosome draw a line ( / ) and for replicated chromosome draw an X. Since we are focusing on the DNA, you can skip drawing the nuclear membrane or spindle fibers. For simplicity, do not indicate that the chromosomes are decondensed chromatin during interphase. Mark and label a place on one of the large chromosomes with the dominant allele of the “A” gene and put the recessive allele “a” on the other homolog. Mark and label a place on one of the small chromosomes with allele “B” and put the recessive allele “b” on the other homolog.