Q: Identify the parts (A, B, C, D) of the chromosome below. B A
A: Answer: A = Chromatids B = Centromere C = Kinetochore D = Kinetochore microtubules It is the…
Q: Define the important exception to the concept of homologous pairs of chromosomes ?
A: The complete set of DNA is called a genome. In prokaryotes, the genome is composed of a…
Q: Given that most chromosomes occur in homologous pairs, do most genes also occur in pairs?
A: Human beings have 23 pairs of chromosomes. Out of which 22 pairs are called autosomes and one pair…
Q: Define the importance of homologous chromosome ?
A: Introduction Chromosomes are referred to the condensed stage of chromatin fibre. Chromosomes are…
Q: Explain Briefly about Topological Domains Within Chromosome Territories.
A: The topological domain within chromosome territories can be observed during the cell division, and…
Q: Describe the mechanism of chromosome compaction
A: Answer:- The chromosomes contain the genetic material of the cell. It contains DNA in coiled form.…
Q: At which stage do homologous chromosomes separatefrom each other?
A: A set of the maternal and paternal chromosomes is collectively known as a homologous chromosome.…
Q: Describe how errors in chromosome structure occur through inversions and translocations
A: Changes which affects the structure of the chromosomes leads to growth and developmental problems…
Q: What type of chromosomal rearrangement occurs o If two homologous chromosomes misalign at repeated…
A: Chromosomes carry the genetic material DNA. Chromosomes may undergo rearrangements that are the…
Q: Explain different levels of chromosome packaging?
A: Chromosomes are the thread-like structures present only during the cell division. Chromosomes are…
Q: What is pairing of homologous chromosomes known as? Where that pairing takes place?
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: What are two nonhomologous chromosomes exchange parts?
A: Translocation is a type of chromosomal abnormality in which a chromosome breaks and a portion of it…
Q: Describe the structure of chromosome and how this structure is related with inheritance?
A: The term chromosome originates from the Greek words for color (chroma) and body (soma). Scientists…
Q: Describe the effects of deletions, duplications, inversions,and translocations on chromosome…
A: Introduction Mutation: any changes in the sequence in the genetic material which leads to disorders…
Q: Explain how nondisjunction produces monosomy and trisomy chromosomeconditions.
A: Mitosis: A type of cell division in which parent cell gives rise to 2 identical daughter cells with…
Q: Which types of chromosome mutations Q. move DNA from one chromosome to a nonhomologous chromosome?
A: A chromosome mutation is a mutation that affects a chromosome 's structure, leading to an anomaly…
Q: Diagram the production of abnormal chromosomes due tocrossing over in inversion heterozygotes?
A: Inversions- it is a chromosomal mutation that arises when two breaks occur in one chromosome, and…
Q: explain Chromosome Aneuploidy?
A: The changes in the number of chromosomes or abnormality in the chromosomal structure are considered…
Q: Distinguish between a translocation and an inversion.
A: Introduction Mutation: any changes in the sequence in the genetic material which leads to disorders…
Q: A chromosome with the following gene order has a paracentric inversion of BCDE. A B C D E F • G H If…
A:
Q: Draw and describe FIVE (5) types of chromosome structural changes
A: After the birth or during the fetal development of zygote or during spermatogenesis or oogenesis…
Q: Which chromosome rearrangements can cause deletions and duplications?
A: A chromosome is a thread like structure present in the nucleus of the cell. It contains the DNA and…
Q: Can structural aberrations on certain chromosomes lead to aneuploidy? If yes, explain.
A: If a sex cell affected by nondisjunction undergoes fertilization, the resulting offspring will have…
Q: Chromosome Pairs 1-22 are considered what type of chromosomes?
A: Chromosomes are filamentous bodies present in the nucleus. They are composed 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: Describe how a ring chromosome forms
A: Ring chromosome is result from two terminal breakage in the both arms of same chromosome, whose ends…
Q: In a Robertsonian translocation, reciprocal exchangesbetween two ____________ chromosomes generate a…
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: Which of the following describes a Homologous Chromosome?
A: The gene is the basic fundamental of heredity. It is found in the chromosomes of the nucleus of the…
Q: draw the diagram of Deletion loops form in the chromosomes ofdeletion heterozygotes.
A: A 'homologous pair' of chromosomes are approximately the same length and centromere position. They…
Q: describe what are Balancer chromosomes?
A: The field of genetics deals with the heredity of organisms. The chief molecules of genetics are…
Q: How acentric chromosome segregate without centromere?
A: Chromosomes are thread-like structures. These thread-like structures have constriction points. This…
Q: What is the approximate size of chromosome 7 inMb?
A: Chromosomes are thread-like structures that are located in the nucleus. It is composed of protein…
Q: How does nondisjunction lead to disorders in chromosome number?
A: When the nucleotides sequences in the genome of an organism are altered or changed due to mistakes…
Q: Explain Nonhomologous chromosomes?
A: The chromosome is a well-organized structure of proteins and DNA (Deoxyribonucleic acid). It is a…
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: How acentric chromosomes segregate without centromeres?
A: Acentric chromosome is a fragment of chromosome that doesn't have a centromere as there lost during…
Q: What process occurs when genes swap position on a chromosome during meiosis, as in the case of Cru…
A: Meiosis is a cellular process where a single cell divides two times to produce four cells containing…
Q: How does the density of genes found on chromosome 22 compare with the density of genes found on…
A: Humans have 23 pairs of chromosomes. Among them 22 pairs of chromosomes are autosomes and the…
Q: Explain the Levels of Chromosome Compaction?
A: Chromosome compaction is the process in which a large DNA molecule undergoes a transition between an…
Q: Explain why Variation Occurs in the Composition and Arrangement of Chromosomes ?
A: Chromosomes are found in the cell's nucleus and contain the genetic material of the cell. A…
Q: Outline the process of polytene chromosome formation?
A: Giant chromosomes are much larger in size than the normal chromosomes, reaching a length a length of…
Q: How Chromosomal Rearrangements are Caused?
A: Numerous structural rearrangements in chromosomes have been characterised, inversions and…
Q: Which changes in chromosome structure cause a change in thetotal amount of genetic material, and…
A: Chromosomal aberrations are changes in the number and arrangement of genes in the chromosomes. They…
Q: What are crossing over between homologous chromosome take place?
A: Chromosome is the package of densely packed chromatin fibers with DNA and histone proteins. In…
Q: Explain what is meant by the term homologous chromosomes ?
A: Chromosomes are condensed forms of chromatin that are visible during cell division. They were found…
Describe three naturally occurring ways that chromosome number
can change?
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- A colleague e-mails you saying that she has identified an interesting chromosome variation at 21q13. In discussing this discovery with a friend who is not a cytogeneticist, explain how you would describe this location, defining each term in the chromosome address 21q13.Two nonhomologous chromosomes have the following segments, where * represents the centromere: *ABCDEFG , *RSTUVWX. Name the type of chromosomal rearrangements that would produce each of the following chromosomes. *ABABCDEFG , *ABCD , GFEDCBA*RSTUVWX , *RSWVUTX , *ABCWX , *RSTUVDEFG . Which of these types of abnormalities are most likely embryonic lethal and which ones are not usually a problem for the individual carrying them? Briefly explain why.The following corn loci are on one arm of chromosome9 in the order indicated (the distances between themare shown in map units):c-bz-wx-sh-d-centromere12 8 10 20 10C gives colored aleurone; c, white aleurone.Bz gives green leaves; bz, bronze leaves.Wx gives starchy seeds; wx, waxy seeds.Sh gives smooth seeds; sh, shrunken seeds.D gives tall plants; d, dwarf.A plant from a standard stock that is homozygous for allfive recessive alleles is crossed with a wild-type plantfrom Mexico that is homozygous for all five dominantalleles. The F1 plants express all the dominant allelesand, when backcrossed to the recessive parent, give thefollowing progeny phenotypes:colored, green, starchy, smooth, tall 360white, bronze, waxy, shrunk, dwarf 355colored, bronze, waxy, shrunk, dwarf 40white, green, starchy, smooth, tall 46colored, green, starchy, smooth, dwarf 85white, bronze, waxy, shrunk, tall 84colored, bronze, waxy, shrunk, tall 8white, green, starchy, smooth, dwarf 9colored, green, waxy, smooth,…
- . One oak tree cell with 14 chromosomes undergoesmitosis. How many daughter cells are formed, andwhat is the chromosome number in each cell?Describe how errors in chromosome structure occur through inversions and translocationsDiscuss the following sets of terms: a) trisomy and triploidy, b) aneuploidy and polyploidy.
- What are micrographs of the stained chromosomes in homologous pairs arranged by decreasing size?"If a fragment of a chromosome breaks off and then reattaches to the original chromosome but in the reverse direction, the resulting chromosomal abnormality is called a translocation." The above statement is True or False? and Explain(a) A person with Down syndrome. She has 47 chromosomes rather than the common number of 46, because she has an extra copy of chromosome 21. (b) A wheat plant. Cultivated wheat is derived from the contributions of threewild species with two sets of chromosomes each, producing an organismwith six sets of chromosomes.Do these examples constitute variation in chromosomestructure or variation in chromosome number?
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