Q: Describe the general organization of a eukaryotic chromosome. What structural role do scaffold…
A: DNA or Deoxyribonucleic Acid is the genetic material in almost all higher animals, including humans.…
Q: What are the half-circle rotations of a chromosomal region?
A: Chromosomes emerge as thread-like structures inside the nucleus during cell division.…
Q: a. What letters are used to represent the short andlong arms of human chromosomes?b. Sketch a…
A: The human chromosomes have two arms; one short and other long. These arms are separated from each…
Q: What are translocation and deletion events that mayoccur during chromosomal duplication or assembly?
A: Cellular biology explains the events starting from DNA synthesis, to replication, transcription, and…
Q: How many genes are there present on chromosome 20 ?
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: Why is the gene for eye color in drosophila present on the X chromosome ?
A: Gene is the basic unit of heredity for all life forms. It is transferable from one generation to its…
Q: What are the number of chromosomes in mouse?
A: Chromosomes are thread-like structures that carry genetic information. Each chromosome consists of…
Q: About 5% of individuals with Down syndrome havea chromosomal translocation in which a third copy…
A: Humans have 23 pairs of chromosomes, that is, the normal chromosome number is 46. Translocation can…
Q: Define the Random Monoallelic Expression: Inactivation of the X Chromosome ?
A: They were discovered in 1876. These are the tertiary structures of DNA (deoxyribonucleic acid)…
Q: What are the number of chromosomes in mustard mouse?
A: In a eukaryotic cell, the genome is distributed among multiple chromosomes located inside the cell’s…
Q: With regard to the segregation of centromeres, why is adjacent-2segregation less frequent than…
A: A specialized DNA sequence of a chromosome which links the two sister chromatids is known as a…
Q: In which chromosome can you find FOG2?
A: Chromosome is a long DNA molecule which is found in nucleus of all cell.
Q: why The chromatids formed byrecombination within the inversion loop of a pericentric…
A: When the region between two breaks of the same chromosome rotate 180°, it results in chromosomal…
Q: What are the possible structural anomalies of chromosomes during metaphase-anaphase Stages…
A: Karyotyping is the process of matching and ordering all of an organism's chromosomes, resulting in a…
Q: Which type/s of histones is/are not part of the histone octamer wrapped by DNA strands but is found…
A: Histones proteins are present as octamer (eight) complex at the center of nucleosome. It consist of…
Q: Eukaryotic chromosomes have multipleorigins of __________?
A: Eukaryotic organisms comprise of the nucleus as well as other membrane-bound organelles and these…
Q: Which sex chromosome (X or Y) carries the gene for eye color in Drosophila?
A: The mode of inheritance is a pattern of obtaining parentral alleles or genes to the offsprings. The…
Q: which functions do the two telomere-associatedcomplexes, telomerase and shelterin, fulfill at…
A: The telomeres represent the ends of all eukaryotic chromosomes and they serve an important…
Q: With regard to development, what would the dire consequences beif polycomb group complexes did not…
A: Polycomb-group proteins basically refer to the proteins possessing the ability to remodel…
Q: If a cell is deficient of Separase, how would this affect the chromosome dynamic during mitosis and…
A: Separase is a protein that is also referred to as separin. It is an important part of the cohesin…
Q: What functions do the two centromere-associatedcomplexes, cohesin and the kinetochore, play…
A: Chromosomes are the condensed form of DNA that are formed by the condensation of chromatin material…
Q: What are chromosome 9 characteristics and where does chromosome 9 represent?
A: The humans consist of 46 chromosomes in each cell that are divided into 23 pairs. There are two…
Q: Map distances were determined for four differentgenes (MAT, HIS4, THR4, and LEU2) on chromosome III…
A: Chromosomes are long thread like structures that carry coded genetic information in the form of…
Q: what is length of chromosome 17 ?
A: The deoxyribonucleic acid (DNA) is the sequence that carries the genetic information of an organism.…
Q: Which sex chromosome (X or Y) carries the gene for eye color in Drosophila? Why?
A: Red eye colour is dominant over white eye colour in drosophila.
Q: How do polytene chromosomes of an insect differ from normal chromosomes?
A: Polytene chromosome were first reported by EG balbiani in the year 1881 from the salivary glands of…
Q: Describe the function of the centromere. How are centromeres different from other regions of the…
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: If a cell is deficient of REC8, how would this affect the chromosome movement during mitosis and…
A: REC8 is a very important component of meiosis specifically the prophase It forms the pro phase…
Q: centromeres consist which two sequences?
A: Centromere is the region in a chromosome that connects the sister chromatids together. Chromosome is…
Q: What is chromosome 12 deletion effects?
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: What chromosome rearrangement is thought to be the source of new genes?
A: Chromosome rearrangement is a change in the order of base sequences along one or more chromosomes.…
Q: what is length of chromosome11 ?
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: The genes dumpy wings (dp), clot eyes (cl), and apterous wings(ap) are linked on chromosome II of…
A: The linkage of the genes in a chromosome can be represented in the form of genetic map. Genetic map…
Q: How many genes are there present on chromosome 14 ?
A: Chromosomes are the small structures like a thread situated within the nucleus ofvarious plant and…
Q: describe a specific example of chromosome abnormality that leads to human cancers, such as leukemia,…
A: Chromosomal aberrations are changes in the number and arrangement of genes in the chromosomes. They…
Q: What is the 2n chromosome number of Valanga?
A: Genetic material are the means by which hereditary information is passed on from one generation to…
Q: Which chromosome lacks a polymorphic heterochromatic region often observed in G-banded chromosomes…
A: In 1928, E. Heitz coined the terms euchromatin and heterochromatin to describe the parts of…
Q: Assuming that 32 million histone octamers arerequired to package the human genome, how many his-tone…
A: Introduction :- Chromosome proteins are a type of protein. Histones bind to DNA, aid in the…
Q: In which chromosome gene 5-HTT locates?
A: Chromosomes are defined as the structures that are present in the nucleus of the cell which carries…
Q: Are the epsilon (ε) and beta (β) genes on chromosome 11 orthologs or paralogs? Explain your answer.
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: Besides the size and position of the centromere, what is the same about these?
A: *Chromosomes are thread like structures located inside nucleus which is made of protein and a…
Q: 22q11.2 deletion syndrome, also called DiGeorge syndrome, causes atypical parathyroid glands, a…
A: Deletion syndrome is a genetic condition in which a tiny piece of a chromosome is deleted. In…
Q: Since eukaryotic chromosomes are assembled with histone proteins, how are replication and…
A: Eukaryotes are the organisms that contain a nuclear membrane covering the nucleus. But the…
Q: a. What DNA sequences are commonly found at human centromeric regions?b. What functions do the two…
A: The cell biology is considered as the study of cells, their structure, and their functions. The…
Q: You are studying a small eukaryotic gene of about 2000 bp in length. About how many copies of…
A: There are histone octamers found in the genetic arrangement whose knowledge can be used to answer…
Q: A new recessive mutant allele doesn’t show pseudodominance with any of the deletions that span…
A: Pseudodominance is defined as the sudden appearance of the phenotype of a recessive gene in a…
Q: Explain how polytene chromosomes of Drosophila are produced and how they form a six-armed structure?
A: Polytene chromosomes are large chromosomes that have thousands of DNA strands. They provide a high…
Q: Why does the sex chromosome X carry the gene for eye color in Drosophila?
A: The mode of inheritance is a pattern of obtaining parentral alleles or genes to the offsprings. The…
Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
Approximately how many copies of chromosome 2 are found in a polytene chromosome in Drosophila?
Step by step
Solved in 2 steps
- What is the approximate location of the centromereon human chromosome 7?8.18 Irradiatioh of Drosophila sperm produces transloca- tions between the X chromosome and autosomes, between the Y chromosome and autosomes, and between different autosomes. Translotations between the X and Y chromosomes are not produced. Explain the absence of X-Y translocations. The birth of this child prompted the Dentons' physician to order a chromosome study of parents and child. The results of the study are shown in the accompanying fig- ure. Chromosome banding was done, and all chromo- somes were normal in these individuals, except some copies of number 6 and number 12. The number-6 and number-12 chromosomes of mother, father, and child are shown in the figure (the number 6 chromosomes are the larger pair): Child Mrs. Denton Mr. Denton a. Does either parent have an abnormal karyotype? If so, which parent has it, and what is the nature of the abnormality? b. How did the child's karyotype arise? (What pairing and segregation events took place in the parents?) e. Why is the child…Colchicine is a chemical mutagen that inhibits the spindle formation and prevents anaphase, which retains the cell’s single restitution nucleus (doubled chromosome number). Suppose that an onion (2n=16) is subjected to three consecutive rounds of colchicine treatment, what will be the resulting chromosome number of the treated onion?
- A cytogeneticist is studying the cells from an abnormal female monkey. In some cells, she finds that both X-chromosomes are active (i.e. not packaged into a Barr body), although one of the X-chromosomes appears shorter. She also finds that one of the autosomes are packaged as a Barr body, and she suspects that a translocation event might have been involved. By referring to the mechanism of X-chromosome inactivation, explain the observations made by the scientistMap distances were determined for four differentgenes (MAT, HIS4, THR4, and LEU2) on chromosome III of the yeast Saccharomyces cerevisiae:HIS4 ↔ MAT 37 cMTHR4 ↔ LEU2 35 cMLEU2 ↔ HIS4 23 cMMAT ↔ LEU2 16 cMMAT ↔ THR4 20 cMWhat is the order of genes on the chromosome?Variations in Chromosome NumberAneuploidy Describe the process of nondisjunction and explain when it takes place during cell division.
- In a turtle species, a diploid cell in the G1 phase of the cell cycle contains 22 picograms of DNA (picogram is a measure of the total mass of the DNA present). How much DNA is present in a cell of the same species at prophase II of meiosis (prophase of the second meiotic division)?What functions do the two centromere-associatedcomplexes, cohesin and the kinetochore, play inchromosome mechanics?A male Drosophila with wild-type phenotype is discovered to have only seven chromosomes, whereas normally 2n = 8. Close examination reveals that one member of chromosome IV (the smallest chromosome) is attached to (translocated to) the end of chromosome II. If this male mates with a female with a normal chromosome composition who is homozygous for the recessive chromosome IV mutation eyeless (genotype = ee), what would be the eye genotypes, eye phenotypes, and total number of chromosomes in all potential offspring if the male is homozygous for the wild-type allele (EE)? put a table for punnet square
- A male Drosophila with wild-type phenotype is discovered to have only seven chromosomes, whereas normally 2n = 8. Close examination reveals that one member of chromosome IV (the smallest chromosome) is attached to (translocated to) the end of chromosome II. If this male mates with a female with a normal chromosome composition who is homozygous for the recessive chromosome IV mutation eyeless (genotype = ee), what would be the eye genotypes, eye phenotypes, and total number of chromosomes in all potential offspring if the male is homozygous for the wild-type allele (EE)?Why is a chromosomal fragment without a centromeresubsequently lost and degraded?Describe the general organization of a eukaryotic chromosome. What structural role do scaffold associated regions (SARs) or matrix attachment regions (MARs) play? Where are genes primarily located relative to chromosome structure?