What is the difference in meaning between the terms geneticrecombination and crossing over?

Q: How can gene duplications occur?

A: An extra copy of the gene is produced in the genome of the organism by the various process is known…

Q: Why is chromosome 21 Down syndrome?

A: Human genetic disorders due to chromosomal abnormalities are caused because of absence or abnormal…

Q: What is a homologous gene?

A: A gene is a sequence of nucleotides in RNA or DNA. It encodes the synthesis of gene product, either…

Q: What are alternative forms of a single gene?

A: The genes are the sequence of nucleotides that are present on the chromosomes and encode for a…

Q: How does gene duplication occur?

A: Gene duplication is the process occurs when an extra copy of gene is produced in the genome of the…

Q: What effect does crossing over have on linkage?

A: Linkage is a tendency of the genes present on a chromosome to remain linked together and also passed…

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: What is a genetic familytree?

A: Genetics is the study of genes, variations, and mechanisms of heredity in organisms. Parents inherit…

Q: Why is the term “crossing-over” appropriate for the exchange of DNA segments between homologous…

A: Crossing over can be defined as the exchange of genetic material that occurs between the non-sister…

Q: What is an imprinted gene

A: Imprinted genes are genes that violate the usual rule of inheritance. Their expression is determined…

Q: What are Possible Dominance Relations in case of antimorphic mutations?

A: Mutations can be classified depending on the behavior of various mutations in different genetic…

Q: why why heterozygosity for a deletion can be harmful?

A: Deletion refers to a type of mutation in which the genetic material in a chromosome is deleted or…

Q: How do translocations such as the Philadelphia chromosome contribute to cancer?

A: Translocations generate novel chromosomes, a segment from one chromosome is transferred to a…

Q: Why does a loss or an excess in genetic material lead to the expression of an abnormal phenotype?

A: Mutations are changes in the DNA sequence. Mutations can occur as a result of errors in DNA copying…

Q: What are Categories of Genetic Variants?

A: The difference in DNA sequence between organisms of a population is called genetic variation. These…

Q: What is the relationship between linked genes and syntenic genes? Are syntenic genes always linked?…

A: Introduction Linkage is the phenomenon in which genes are situated on the same chromosome (linked…

Q: What is terminal deletion in genetics?

A: A single break may cause terminal deletion; but, due to the need for specific chromosome tips…

Q: What is the advantage of duplication and divergence of genes?

A: Chromosomal aberration is known as abnormality in the sequence or in the arrangement of the…

Q: Why is the incidence of survivable genetic disorders involving deletions of parts of chromosomes so…

A: Deletions are the genetic aberrations or mutations in which a sequence of DNA or a segment of a…

Q: What type of epigenetic change is responsible for genomic imprinting?

A: Epigenetic refers to the patterns of inheritance that involve the alterations in characteristics…

Q: What are the products of crossing over?

A: The process in which parent cells divide and produce two or more daughter cells is referred to as…

Q: How are linked genes similar to sex-linked genes? How are they different?

A: The term gene was derived from the Greek word meaning generation. It is the basic hereditary unit of…

Q: What are genes located on the same chromosome?

A: Genetic recombination refers to the rearrangement of DNA sequences by the breakage and rejoining of…

Q: What is pseudodominance and how is it produced by a chromosome deletion?

A: The expression of typically recessive transformation that is created when the dominant wild sort…

Q: Which are the Several steps that lead to an understanding of genetic phenomena?

A: Genetic phenomena includes all the biological processes which has the ability to express,maintain…

Q: Why are jumping genes important?

A: Jumping genes are also known as transposable elements or transposons. They are the DNA sequences…

Q: How is it that asymmetric cell division influences gene regulation? What are the factors that…

A: The mechanism by which a parent cell splits into two or more daughter cells is cell division. As…

Q: What is the purpose of a pedigree?

A: Genetics is a branch of biology that is concerned with the study of Nucleic acids ( Ribonucleic…

Q: What is the link between a phosphate functional group, the cellular respiration and the X-linked…

A: A phosphate functional group is a simple phosphorus atom that is bound to four oxygen atoms.…

Q: overlapping genes?

A: The basic physical and functional unit of heredity is the gene. DNA is the material that makes up…

Q: What occurs during duplication chromosomal mutation?

A: Mutations are defined as sudden heritable change which alters the expression of a gene.

Q: What type of epigenetic mark is responsible for genomic imprinting?

A: Epigenetic mark allows genes to switch off or on. These generally change the way genes are…

Q: Why Phenotypes may show variations in penetrance and expressivity?

A: Genetics is a branch of science that deals with the study of genes, heredity, and genetic variation…

Q: What are Possible Dominance Relations in case of neomorphic mutations?

A: Any permanent change in the DNA’s nucleotide sequence is termed as mutations. Based on their effect…

Q: What kind of chromosomal mutations is/are produced by unequal crossing over?

A: Chromosome mutations are changes that arise in chromosomes as a result of nuclear division mistakes…

Q: There are two types of errors, trisomy and monosomy. What do they mean, how do they occur?

A: Chromosomal disorder are of two types -  1. Aneuploidy - In aneuploidy , addition or deletion of one…

Q: What is chromosome theory of inheritence?

A: Chromosomes are thread-like structures made up of chromatin.

Q: What are Possible Dominance Relations in case of amorphic mutations?

A: Mutation is the sudden heritable changes that occur in the DNA sequences due to error while…

Q: How does nondisjunction lead to abnormalities in chromosome number? Describe two types of genetic…

A: The failure of chromosome to seperate properly  during mitosis or meiosis is called nondisjunction…

Q: Two phenotypically unaffected parents produce two children withfamilial Down syndrome. With regard…

A: Chromosomal aberrations include changes in the structure and number of chromosomes. Thus, meiosis…

Q: What is the difference between forward and reverse genetics?

A: Genetics is a branch of biology concerned with the study of genes, genetic variation, and heredity…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.