What is the law of the superposition?

Q: What are nondisjunction?

A: A sister chromatid is defined as the identical copies (chromatids) formed by the DNA replication of…

Q: Could there be any significance to the fact that the crosses concern genes on a very small…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: What is meant by the termhomologous chromosomes?

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

Q: What does an extra chromosome 16 mean?

A: Chromosomes, the physical carriers of genes, are the microscopic thread like structures in which the…

Q: What does the expression wild type mean?

A: Genetic traits are regulated by genes.

Q: What causes nonreciprocal translocation?

A: All cellular systems are controlled by proteins. Proteins are synthesized by the cell by a process…

Q: What are polytypic genes?

A: Genes are defined as the building blocks and the coded information that defines the complete physico…

Q: Who is the proband in a pedigree? Is the proband always found in the last generation of the…

A: Pedigree analysis is a scientific approach that helps to study the inheritance of genes. In this…

Q: How many phenotypes are possible?

A: All cellular systems are controlled by proteins. Proteins are synthesized by the cell by a process…

Q: How many genes are there on chromosome 3?

A: All cellular systems are controlled by proteins. The instruction for the synthesis of proteins is…

Q: Do you think mendal's law of inheritence would have been different if the character that he choose…

A: Gregor Mendel was a scientist who worked in the field of molecular biology and genetics. These…

Q: How many genes are there present on chromosome 16 ?

A: Chromosomes are long thread like structures that contain the genetic information in the form of…

Q: What is a gene with only one common, wild-type allele?

A: The coding region of the gene is known as allele. Wild-type alleles are the original form of the…

Q: How many genes are there present on chromosome 22 ?

A: DNA gets condensed to form chromosomes during cell division. Chromosomes are rod shaped chromatin…

Q: Why is random assortment of chromosomes necessary? What can we expect if this does not occur?

A: When reproductive cells mature, the Principle of Independent Assortment outlines how various genes…

Q: What are Neomorphic alleles?

A: The neomorphic mutation is a type of mutation in which the altered gene product possesses a novel…

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: What is Tetrasomy ?

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: How do we know whether two chromosomes are homologous?

A: Homologous chromosomes are made up of chromosome pairs having  Similar length, Similar centromere…

Q: Why is random assortment of chromosomes necessary? What can we expect if this does not occur?

A: Gregor Mendel postulated a laws of inheritance ;which are mainly applicable to the eukaryotic…

Q: Which one cannot be a reason for chromosome disjunction anomaly?

A: Disjunction anomaly  When the chromosomes of a cell unable to separate and each daughter cells got…

Q: How many genes are there present on chromosome 15 ?

A: A chromosome is a microscopic structure that consists of proteins and DNA, and is present in every…

Q: What is inversion heterozygotes ?

A: Heterozygote can be defined as the genes that are  for the specific trait are considered to be…

Q: How many genes are there present on chromosome 9?

A: The study of genes comes under Genetics. Genes are the structural and functional unit of life. They…

Q: Which is the smallest chromosome ?

A: Chromosome is the carrier of genetic material of the human body. To be precise, it is a…

Q: When are two genes considered linked?

A: Genetic linkage describes the process in which two genes that are located close to each other on a…

Q: Why is the frequency of recombinant gametes always half the frequency of crossing over?

A: Crossing over is the way in which exchange of genes between two chromosomes, lead to non-identical…

Q: Which individuals can be termed as clones?

A: DNA is the genetic material in most living organisms. It is the information hub that contains…

Q: How does a chromosomal duplication occur?

A: When a part of chromosome is present in two copies or duplicated, it is known as duplication. This…

Q: How translocation Down syndrome arises?

A: Down’s syndrome is a genetic disorder that occurs mostly in children. It leads to intellectual…

Q: Is Robertsonian translocation reciprocal?

A: Chromosomes are thread-like structures that are located in the nucleus. It is composed of protein…

Q: What is chromosomal rearrangements?

A: “Chromosomes” are “thread-like structures” and is composed of “protein” and a “DNA molecule” which…

Q: What are the possible effects of chromosomal rearrangements?

A: In genetics, a chromosomal rearrangement or Any alternation in the sequence of nucleotide in the…

Q: How many genes are there present on chromosome 21 ?

A: Chromosomes are thread-like structures that are located in the nucleus. It is composed of protein…

Q: Which non-disjunction event has more chromosome number aberrations? Why?

A: Meiosis is a reductional division. It produces haploud gametes.

Q: What is inversion heterozygote?

A: Inversion is a chromosomal rearrangement when a segment of chromosome breaks and then rejoins in…

Q: What is the difference between alleles and homologous chromosomes?

A: The term 'chromosome' has been derived from the Greek words which means 'color (chroma) and body…

Q: What is the rule of inversion?

A: Genes are the functional unit of heredity. The genes code for proteins which are vital for growth…

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: 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 diploid genome ?

A: The examination of a person's entire genome, along with how their genes communicate with one another…

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: What is heterozygous variant?

A: The term heterozygous variant belongs to a subdivision of biology, genetics. Genetics is the study…

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: What are noninformative matings. ?

A: The mating that reveals the inheritance or linkage relationships of a gene or an allele are…

Q: How many genes are there on chromosome 1?

A: In eukaryotes, chromosomes are present in the nucleus but in prokaryotes, the nucleus is not present…

Q: What is the difference between polygeny and pleiotropy?

A: Biological inheritance, also called heredity, is the process by which different traits are passed on…

Q: Why are some crosses not performed in a complementation matrix?

A: Complementation is the capacity of 2 mutants in combination to reinstate the normal phenotype. The…

Q: How do we know if Nondisjunction occurs in meiosis one or two?

A: Meiosis is a type of cell division which generally occurs in germ cells or reproductive cells.…

Evolutionary lineages

An evolutionary lineage is a series of populations of organisms that descend from a common ancestor. Each species in the lineage is the direct consequence of evolutionary change from a common ancestor. A phylogenetic tree is generally used to display lineages visually. Lineages are components of the phylogenetic tree of life. Molecular systematics procedures are widely used to predict lineages.