If you expose a culture of human cells (for example,HeLa cells) to 3H-thymidine during S phase, howwould the radioactivity be distributed over a pair ofhomologous chromosomes at metaphase? Would theradioactivity be in (a) one chromatid of one homolog,(b) both chromatids of one homolog, (c) one chromatid each of both homologs, (d) both chromatids ofboth homologs, or (e) some other pattern? Choose thecorrect answer and explain your reasoning.

Q: Assume that diploid plant A has a cytoplasm genetically different from that of plant B. To study…

A: The plant will produce by ;

Q: Does crossing over occur during prophase II? From an evolutionary perspective, why is this…

A: Chromosomes can be defined as the thread-like structures that is  located inside the nucleus of…

Q: Why are the two cells produced by the cell cycle genetically identical?

A: The cell is the basic unit of life. The tissue is a group of cells that perform a specific function.…

Q: Explain the following terms: Non-histone Chromosomal (NHC) proteins, euchromatin &…

A: Chromatin is a complex of DNA and protein found in eukaryotic cells. The primary function of…

Q: Paclitaxel stabilizes microtubules by inhibiting the disassembly of the tubulin subunits.  What…

A: Answer: Paclitaxel stabilizes  microtubules by inhibiting the disassembly of the tubulin subunits…

Q: What is a structure in the centromere region of each chromatid that is specialized for conveyance?

A: Cell is the smallest structural and, functional unit of life. It is simple machinery that houses all…

Q: The Y chromosome contains large amounts of constitutive heterochromatin. Why might there be more…

A: Constitutive heterochromatin is generally found in the centromere regions and also, at the telomere…

Q: According to the endosymbiosis theory, mitochondria and chloroplasts are derived from bacteria that…

A: The endosymbiotic theory tells about the origin of two eukaryotic organelles which possess the…

Q: In the eukaryotic nucleus during interphase, a strand of chromatin consisting of eight conserved…

A: Interphase is the part of the cell cycle that is not followed by significant changes under the…

Q: 100 75 50 25 0 dod 10 15 20 25 30 time (hours) A. In which phase of cell cycle would cells contain…

A: A cell cycle is a series of events that takes place in cell because of formation of the daughter…

Q: Beginning with the G1 phase of the cell cycle, describe the levelof compaction of the eukaryotic…

A: The cell division in eukaryotes is a well-regulated process, where the genome is compressed to form…

Q: a. Manually, using a pencil, draw a cell in anaphase II from an organism in which 2n = 2 and each…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Why does therecombination frequency ofgenes vary with the distancebetween them in thechromosome?

A: The genetic material exchange between the two homologous chromosomes and that produces recombinant…

Q: What difference exists between the compaction of chromosomes during metaphase versus interphase?…

A: Chromosomal condensation: In the case of a eukaryotic chromosome, there are 3 levels of chromatin…

Q: There are 40 chromosomes in somatic cells of the house mouse. (a) How many chromosomes does a mouse…

A: The chromosome number of an organism is very specific and in case of a diploid organism, half of…

Q: Consider the following DNA molecule (shown in the picture) and assume this is the DNA sequence of…

A: Amino acid sequence formed from the 5'to 3' end is  tta   atc gtc  tac  gta  cta   cgt  taa tga  tcg…

Q: Suppose cells in an experiment had been labeled with green fluorescent tubulin. At the onset of…

A: As the cell progresses through anaphase B, the bleached spots or the microtubules closer to the…

Q: Name the disorder with choromosome compliment 22 pairs of autosomes +XXY?

A: Abnormalities of the Chromosome can be numerical or structural. A numerical abnormality means an…

Q: What is the final result of mitosis in a human A) nearly genetically identical 2n somatic cells B)…

A: Mitosis: It is the process in which newly replicated chromosomes equally divided into two daughter…

Q: If DnaA was not regulated in Escherichia coli and multiplerounds of replication were completed…

A: The replication process initiates at the origin of replication in the genome. This sequence…

Q: A cytogeneticist is studying the cells from an abnormal female monkey. In some cells, she finds that…

A: When a mammal embryo is developing, one of the chromosomes in each pair will randomly become…

Q: specific human individual with a male sex has the same sex chromosome complement as a metafemale…

A: Metafemale: 3 sets of X chromosomes or in other words an extra X chromosome with autosomes

Q: The molecular mechanism of SCE is similar to homologousrecombination between homologs except that…

A: Thread like structures present inside the nucleus of a cell are known as chromosomes. Chromosomes…

Q: Cohesin complexes hold chromatids together until theenzyme___________ cleaves the cohesin at…

A: Cohesin are the protein complex that holds sister chromatids together till anaphase. It helps in…

Q: What is the name of the structure that holds the sister chromatids together? See image below.

A: CENTROMERE - A highly condensed DNA sequence that is transcriptionally inactive and is…

Q: Explain, through the use of an illustration, the role of the anaphase promoting complex (APC / P) in…

A: The anaphase-promoting complex/cyclosome (APC/C) is a multisubunit ubiquitin protein ligase that…

Q: Mitotic nondisjunction can occur, particularly in tumor cells. Assume a single nondisjunction event…

A: The failure to separate homologous chromosomes or chromatids during cell division (mitosis or…

Q: Domesticated sheep cells have a total of 54 chromosomes (versus 46 chromosomes in human cells). (a)…

A: Chromosomes are the structures that carry DNA.

Q: A group of cells is assayed for DNA content immediately following mitosis and is found to have an…

A: Mitosis is the process in which identical copy of a cell is made and is plain cell division and is…

Q: The mitotic cell divisions in the early embryo ofD. melanogaster occur very rapidly (every…

A: Cell division is a natural process in which a parent cell divides into two daughter cells. Cell…

Q: In eukaryotic cells, the nuclear envelope has to disappear in order to directly permit _____. A. the…

A: Mitosis in eukaryotic cells is generally divided into 4 stages - Prophase Metaphase Anaphase…

Q: I am trying to  understand DNA/chromosome structure and replication. I have a culture dish of human…

A: DNA is the genetic material present in the nucleus of the cells of an organism. It directs the…

Q: Anaphase B involves the separation of spindle poles. What forces have been proposed to drive this…

A: Anaphase is the third stage, followed by metaphase that is characterized by the seperation of…

Q: why The chromatids formedby recombination within the inversion loop of a paracentric…

A: When the region between two breaks of the same chromosome rotate 180°, it results in chromosomal…

Q: If you expose human tissue culture cells (for example,HeLa cells) to 3H-thymidine just as they enter…

A: S phase or synthesis phase of the cell cycle occurs between G1 phase and G2 phase of the interphase.…

Q: The completely synthetic yeast chromosome Syn IIIcontains a loxP site in the 3′ UTR of every gene…

A: Genome is defined as the complete genetic material that is present in an organism. It consists of…

Q: Consider an organism of karyotype 2n = 4. Which diagram properly depicts metaphase II?

A: Meiosis:  It is a type of cell division in which a mother cell divides into four genetically…

Q: 13 dalian View of the World cable 10. In the figure in the book showing Barbara McCliptock and…

A: Inheritance is the process of transmitting the traits from parent to offspring. Traits of an…

Q: swapped between non-sister chromatids within a tetrad. What is the term for this exchange of genetic…

A: Ans. Morgan and Cattell used the word crossing over in 1912 for the first time. The swap of genetic…

Q: The characteristic “X” shape of chromosomes is _____. a. a result of maximum compaction of the…

A: The X-shape is also not one chromosome: it's two. One of the two angled columns that make that “X”…

Q: . Genomes A, B, and C all have basic chromosomenumbers (x) of nine. These genomes were…

A: Ploidy is the change in the number of chromosomes in an organism. The change that involves the…

Q: A prairie grass species called "little bluestem" is tetraploid. It has four complete sets of…

A: Meiosis is a type of cell division where a single cell divides twice to produce four cells…

Q: In this image of the human karyotype:   A. The sister chromatids have separated   B. There are 46…

A: The sequential events occurring in the life of a cell is called the cell cycle. There are four…

Q: What structure is formed by when  two sister chromatids areheld together by a centromere?

A: In the process of cell division, the chromatin present in the nucleus shrinks and form a thread-like…

Q: 1 2 I 3 . . (a) Identify the point in mitosis at which separase cleaves the protein complex that…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Your somatic cells are diploid. True or False?

A: A somatic cell, or vegetal cell, is any biological cell forming the body of a multicellular organism…

Q: X chromosome inactivation in a diploid XX female is not completely inactivated, explain?

A: Introduction  X chromosome inactivation: it is also referred as Lyonization. In this there is…

Q: Why do human germ cells (cells that undergo meiosis to produce gametes) express the enzyme…

A: Cell division is a process of a parent cell replicating it chromosomal content and dividing itself…

Q: A homologous pair is composed of     four sister chromatids, each with its owncentromere.     four…

A: Homologous chromosomes, also known as homologs, are a pair of chromosomes in a karyotype that have…

Genomic studies

Genomic studies (genomics) is the study of the whole genome of an organism. Using bioinformatics and high-performance computing, genomic researchers examined massive amounts of deoxyribonucleic acid (DNA)-sequence data to discover variations or mutations that affect drug response, health, or disease. Genomics is a much younger discipline than genetics, having only emerged in the last few decades as a result of technological advancements in DNA sequencing and computational biology.