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: Maleness and Male Fertility Are the OnlyKnown Y-Linked Traits in Humans Explain?
A: Humans have an XX-XY type of chromosomal determination of sex. Females possess two homomorphic or…
Q: Describe the process of X-chromosome inactivation in mammals
A: X-chromosome inactivation, also known as lyonization, is a process by which one of the copies of the…
Q: explain why telomeres at the end our chromosomes shrink as we grow older.
A: Telomere End of chromosome made up of repetitive non coding DNA.
Q: What sex ratio would you expect among the offspring of a cross between a normal mape mouse and a…
A: Sex ratio is defined as the ratio of males and females in the population. Generally in sexually…
Q: illustrate that the homologous chromosomes are still connected to each other even after the…
A: Homologous chromosomes are the two molecules of DNA (deoxyribonucleic acid) having the same gene…
Q: Why are there no humans with monosomy 22? because chromosome 22 is very small, it is very stable and…
A: The correct option is shown below.
Q: What would be the effect on genetic diversity if homologous chromosomes did not randomly separate…
A: Answer: Introduction: The order of events that results in cell development and cell division is…
Q: Some people compare a homologous pair of chromosomes to a pair of shoes. Explain the similarity. How…
A: Homologous pairs of the chromosome are those chromosomes which have the same type of structure and…
Q: Explain the relationship between genetic and physical maps of a human chromosome.
A: According to the question, we have to provide an explanation of the relationship between genetic and…
Q: Explain why genes located on the same chromosome are said to be linked. Why do alleles of linked…
A: A gene is a unit of hereditary arranged in thousands on the strands of DNA(deoxyribonucleic acid)…
Q: Person A has a mutation in a chromosome in a liver cell, while person B has a mutation in a…
A: Mutation refers to sudden heritable change in the phenotype of an individual. In the molecular term,…
Q: Explain how domain shuffling could occur by recombination (crossing over) of different genes during…
A: Domain shuffling is a process where gene segments coding functional domains are shuffled between…
Q: If we call the amount of DNA per genome “x,” name asituation or situations in diploid organisms in…
A: Introduction: Amount of DNA varies in the cell according to the phase it is in with respect to the…
Q: Discussions of human ancestry sometimes refer to the “Mitochondrial Eve” and “Y-chromosome Adam.”…
A: Mitochondrial eve is refer to mother mitochondrial Dna which only passes to the daughter from mother…
Q: Explain the difference between crossing over and reciprocal translocation. Give an example of a…
A: Genetic recombination is a process by which organisms acquire genetic diversity. The exchange of…
Q: Explain why the chances of survival are greater for a trisomy or monosomy of the sex chromosomes…
A: The variant forms of a particular gene occupying the same locus on a chromosome are termed alleles.…
Q: Suppose you are analyzing the DNA from the polar bodies formed during human oogenesis. If the woman…
A: The process of the development of an oogonium into a mature ovum is termed oogenesis. It involves…
Q: The karyotype consists of the number and structure of the chromosomes.How do changes in the…
A: A karyotype is the complete set of chromosomes of an individual which helps in identifying…
Q: Edwards Syndrome is a genetic condition in which a person has three copies of chromosome 18. This…
A: Ans. Edward syndromes (which are referred to as trisomy 18), are a syndrome of chromosome defects…
Q: Genes that influence a given characteristic and arealigned with one another on a chromosome pair…
A: The branch of biology which deals with genes and their heredity and the genetic variation is called…
Q: а. Researchers have found that the gene that codes for APP is on which chromosome?
A: Amyloid beta precursor protein (APP) is an integral membrane protein that are usually found in the…
Q: describe the Idiogram of the human X chromosome
A: Chromosomes are the form of genetic material and they are coiled structures composed of DNA and…
Q: Which of the following findings supports the fact that the presence of the Y-chromosome rather than…
A: In mammals the sex chromosomes are X and Y. The genotype for a normal female is XX and that of…
Q: Explain why small deletions and duplications are less likely tohave a detrimental effect on an…
A: A mutation is a permanent change in the DNA of a cell such that the sequence deviates from what is…
Q: By using a diagram illustrate the condition that leads to Down syndrome (2n=47,extra copy of…
A: Down syndrome is congenital autosomal genetic disorder due to the trisomy 21 number chromosome,…
Q: This pedigree exhibits a maternal effect. What is the genotype of each individual?
A: Pedigree analysis is useful when identifyig any population when progeny data from several…
Q: Identical twins each carry the same genome, but over time, can develop different phenotypes. How can…
A: Identical twins are formed as a result of the fertilization of a single egg. The zygote later splits…
Q: As pointed out in the section Evolution of the Y Chromosome, some researchers have predicted that…
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: Create an artwork (illustration/drawing) that differentiates autosomes and sex chromosomes.
A: The main difference between autosomes and sex chromosomes is that autosomes are the chromosomes…
Q: To determine whether radiation associated with the atomic bombings of Hiroshima and Nagasaki…
A: Mutations are changes that occur in the deoxyribonucleic acid (DNA) sequence, either due to mistakes…
Q: The human RGS10 gene is found on Chromosome 10. How many copies of RGS10 does one egg gamete have,…
A: The meiotic cell division is a process that takes place exclusively during the phenomenon of Sexual…
Q: In humans, why is it that the mother determines whether her sons will get recessive sex-linked…
A: Human X and Y chromosomes determine the biological sex of a person. XX specifies female and XY…
Q: Which phrase best describes a human with the chromosomes represented in the karyotype below? * 1 5…
A: Symptoms present in down syndrome are flattened face,tiny head,short neck,protrusion of tongue, poor…
Q: Nullisomy is a genome mutation where a pair of homologous chromosomes that would normally be present…
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: Describe when X-chromosome inactivation occurs and how thisleads to phenotypic results at the…
A: Chromosomes are the carrier of genetic material deoxyribonucleic acid (DNA). They are coiled in…
Q: Explain how human cells compensate for the X-linkedgene dosage difference in XX and XY nuclei.
A: A sex chromosome is a chromosome that differs from an ordinary autosome in form, size, and behavior.…
Q: Which findings support the fact that the presence of the Y- chromosome rather than the lack of a…
A: In many animals including humans, sex is determined by sex chromosomes, which are X and Y…
Q: What is dosage compensation with respect to the sex chromosomes? Briefly explain how this is…
A: The method by which organisms adjust gene expression between individuals of different biological…
Q: A black female cat (XBXB) and an orange male cat (X0Y) weremated to each other and produced a male…
A: A calico cat is any breed of cat that has a tri-colored fur. It will mostly consist of a…
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: What are two possible explanations for why the same genotype (DNA) can result in different…
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: DNA fingerprinting does not study the whole chromosome. Explain.
A: DNA fingerprinting: a. It is a forensic test to identify and evaluate genetic information. b. The…
Q: Why do individuals with an excessive number of sex chromosomes often show minimum phenotypes?
A: Introduction :- The X and Y chromosomes are found in humans and most other mammals. Males have both…
Q: Explain why the distance between two genes alonga chromosomeis associated whether they are linked or…
A: Humans have 23 chromosomes. Within it, there are nearly 19000 genes. The term Genetic linkage can…
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- Provide two reasons why meiosis leads to genetic variation in diploid organisms.Explain why the distance between two genes alonga chromosomeis associated whether they are linked or not linked with each other.Assuming (i) that the two chromosomes in everyhomologous pair carry different alleles of somegenes, and (ii) that no crossing-over takes place, howmany genetically different offspring could any onehuman couple potentially produce? Which of thesetwo assumptions (i or ii) is more realistic?
- The karyotype of a young girl who is affected with familialDown syndrome revealed a total of 46 chromosomes. Her olderbrother, however, who is phenotypically unaffected, actually had45 chromosomes. Explain how this could happen. What wouldyou expect to be the numbers of chromosomes in the parents ofthese two children?A) Hoe many cells are produced by the end of meiosis II? B) Are the cells produced at the end of meiosis II haploid or diploid? C) Are the chromosomes of the four final meiotic products replicated or nonreplicated?Explain how the separation of homologous chromosomes during meiosisaffects the appearance of siblings (such that some resemble each other and others look very different from one another).
- For part c, do they consider the total sex chromosomes to be 2 or 3?Fathers contribute more new point mutations to theirchildren than mothers. You may know from general biology that people have sex chromosomes—two X chromosomes in females and an X plus a Y chromosome inmales. Both sexes have the autosomes (A’s).a. On which type of chromosome (A, X, or Y) wouldyou expect the genes to have the greatest number ofnew mutations per base pair over many generations ina population? Why?b. On which type of chromosome would you expect theleast number of new mutations per base pair? Why?c. Can you calculate the expected number of newmutations per base pair for a gene on the X and Ychromosomes for every one new mutation in a geneon an autosome if the mutation rate in males is twicethat in females?Nine-banded armadillos almost always give birth to four offspringthat are genetically identical quadruplets. Explain how you thinkthis happens.
- Explain the rationale behind a testcross. Is it necessary for one ofthe parents to be homozygous recessive for the genes of interest?In the heterozygous parent of a testcross, must all of the dominantalleles be linked on the same chromosome and all of the recessivealleles be linked on the homolog?A black female cat (XBXB) and an orange male cat (X0Y) weremated to each other and produced a male cat that was calico.Which sex chromosomes did this male offspring inherit from itsmother and father? Remember that the presence of the Y chromosome determines maleness in mammalsExplain the events that would lead to uniparental diploidy in an organism