When the chromosomes of closely related species are compared, a. the banding patterns are often similar. b. a few structural alterations may be seen. c. a change in chromosome number may be seen. d. all of the above are commonly observed.

Q: Which of the following statements does not correctly describe the characteristics of homologous…

A: Homologous chromosomes- Two pieces of DNA, one from each parental source present in a diploid…

Q: What is the outcome of a Robertsonian translocation? a. Two acrocentric chromosomesb. One large…

A: Robertsonian translocation (ROB) is chromosome translocation (unusual arrangement of a chromosome)…

Q: The diagram of a gamete below depicts a single chromosome within a gamete. The bars spanning the…

A: The term "genetic diversity" describes the wide range of genetic traits present in a population or…

Q: What is a haplotype?a. A species with one set of chromosomesb. A cell with one set of chromosomesc.…

A: The ploidy term refers to the number of sets of the chromosomes. The euploidy refers to the…

Q: Which of the following is correct regarding polytene chromosomes?    options:   A.  Exposure to a…

A: DNA contains inheritable segments that are called genes that contain instructions for protein…

Q: Staining eukaryotic chromosomes is useful because it makes it possible toa. distinguish chromosomes…

A: Eukaryotic chromosomes are the chromosomes having coiled structures of DNA in between protein…

Q: Although a virus is very virulent now, it will eventually evolve to become much less virulent.…

A: A virus is a submicroscopic organism that contains genetic information either in the form of DNA…

Q: . All the genes on one chromosome are said to form aa. chromosomal group.b. recombination group.c.…

A: All the genes on one chromosome are linked together on a continuous DNA (deoxyribonucleic acid)…

Q: Genes are arranged in a chromosome: Select one: O a. Irregularly O b. Orderly O c. Linearly O d. In…

A: Gene can be defined as a functional unit of heredity or inheritance .These are the small segments of…

Q: What is a haplotype?a. A species with one set of chromosomesb. A cell with one set of chromosomesc.…

A: Chromosomes are filamentous bodies present in the nucleus. They are composed of DNA(…

Q: 11. There are 4 pairs of chromosome in a fruit fly. How many linkage groups is/are present?  A. 20…

A: Genes are the units (physical and functional) of heredity, made up of DNA or deoxyribonucleic. In an…

Q: Genetic variation can occur as a result ofa. random mutations in genes.b. changes in chromosome…

A: Genes are the elements that carries genetic information from one generation to the other. Genes are…

Q: Which of the following best describes the mechanism behind pleiotropy? A. A single gene controls a…

A: The trait that is physically expressed means can be seen from outside  for example shape , size ,…

Q: Due to crossing over within an inversion loop, a heterozygotewith a pericentric inversion may…

A: Inversion is a type of mutation in which a chromosome segment is broken in two places, turned upside…

Q: Which of the following are types of segmentation genes? a. Gap genes b. Pair-rule genes c.…

A: A gene is the basic unit of heredity, physical and functional. Gens consist of DNA. Some genes act…

Q: Which type of chromosome mutation is the following? (><BCDEFG

A: Mutation is any change in the DNA sequence. Any change in the chromosome number is classified as…

Q: What type of chromosome mapping relies on microscopy?a. Cytogenetic mappingb. Linkage mappingc.…

A: Chromosome mapping is a technique that is used to find the position of various genes on the…

Q: If a part of the chromosome was transferred to a non-homologous chromosome. Then which of the…

A: If a part of chromosome was transferred to a non homologous chromosome,the phenomenon is known as…

Q: In fruit flies, dosage compensation is achieved bya. X-chromosome inactivation.b. doubling the…

A: Dosage compensation refers to the mechanism of equalizing or balancing the expression of genes. It…

Q: Which of the following is true of a species that has a chromosomes number of 2n=16? a. The species…

A: Meiosis is a reductional division which is responsible for producing the gametes from the diploid…

Q: Comparative genomicsa. is the application of computer technologies to the study of thegenome.b. is…

A: Comparative genomic is the field of biological research in which the genomic features of different…

Q: Locus heterogeneity means that a genetic disordera. has a heterogeneous phenotype.b. is caused by…

A: The correct answer is (a) has a heterogeneous phenotype.

Q: Which of the salt-marsh grasses is a polyploid? a. Spartina maritima b. Spartina alterniflora c.…

A: A type of speciation (sympatric) takes place with the help of polyploidy. Polyploidy refers to the…

Q: Which is NOT an affect of chromosomal translocations? A. Translocation breaks can disrupt existing…

A: In a translocation, a segment from one chromosome is transferred to a nonhomologous chromosome or to…

Q: After genetic selection, some originally diploid species can become triploid, like for example some…

A: Triploidy is referred to as 3n, with 1n is the haploid chromosome number for the species in…

Q: Which of the following is correct as the polyploidization mechanism?    options:   A, Two related…

A: The correct answer is Option C. i.e. (Both A and B)

Q: Which of the following are not responsible for increasing genetic diversity in an organism? Select…

A: Genetic diversity is the variations in the genetic makeup and characteristics of a species within a…

Q: Chromosome duplications often result in abnormal phenotypes because a. developmental processes…

A: Duplication is a type of mutation. It involves the production of more copies of a particular region…

Q: Errors in crossing-over can happen when...   Select one: a. Non-homologous chromosomes cross-over…

A: Unequal crossing over is a form of gene duplication or deletion in which a sequence in one strand is…

Q: Which of the following mechanisms are important for generating new genotypes in species that…

A:

Q: Which of the following statements is FALSE about x chromosome inavtivation in mammals? A. It relies…

A: X chromosome inactivation is also knows as lyonisation. It occurs in females.

Q: Match Column A with Column B. v Alternative forms of a gene A Alleles B. v Physical location of the…

A: DNA is the genetic material that carries all the genetic information. The DNA is coiled around…

Q: When comparing evolutionary similarities between different genes within a gene family, it is usually…

A: A gene is a sequence of DNA that codes for a specific protein. Proteins are the building blocks of…

Q: Which of the following best describes Klinefelter syndrome?   A. It is an example of aneuploidy.…

A: Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of  X…

Q: 1C. You sporulate the diploid yeast created by mating Haploid 1 and Haploid 2 and examine the…

A: Since we only answer 1 question in case of multiple question, we’ll answer the first question as the…

Q: During the molecular process of homologous recombinationbetween homologous chromosomes,a. a Holliday…

A: Recombination ais the process where the genes are reassorted into different combinations.…

Q: ecies I has 2n = 12 chromosomes (AABBCCDDEEFF). A closely lated species (Species II) has 2n = 8…

A: Allotriploid species contains three sets of chromosomes from two different species. Its…

Q: Which of the following statements about molecular markersare true?A. All molecular markers are…

A: The term genomics stands for the steps taken to sequence the entire genome of an organism. The…

Q: Species I has 2n = 16 chromosomes. How many chromosomes will be found per cell in each of the…

A: According to bartleby guidelines, first three subparts have been answered. Kindly post the remaining…

Q: Step 3: Compare the Parentals with the Double Cross Overs (DCO) to determine the correct order of…

A: As per our guidelines policy, We are supposed to answer first three sub parts of a question. Please…

Q: If a tetraploid species gave rise to a new species by autopolyploidy, how many sets of homologous…

A: Introduction : The number of full sets of chromosomes in a cell, and thus the number of potential…

Q: Genetic linkage occurs becausea. genes that are on the same chromosome may affect thesame…

A: In nucleus of a cell – DNA is present in form of chromosomes. These are compact structure of DNA…

Q: A paracentric inversiona. includes the centromere within the inverted region.b. does not include the…

A: Inversion is a type of mutation in which the chromosome rearrangement takes place, in which a…

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.