What is a homologous pair (also called a tetrad)?

Q: What are nondisjunction?

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

Q: For a hexaploid what is the value of x where x refers to the basic chromosomenumber that makes up a…

A: Ploidy refers to the number of chromosomes present in the nucleus of a cell. In normal somatic…

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: What causes   Allopolyploidy?

A: Polyploidy is a phenomenon of having more than two sets of chromosomes. It occurs due to failure of…

Q: Which pair number represents the sex chromosomes?

A: The karyotype is the type of chromosomes or number of chromosomes present in the nucleus of a…

Q: Arugue the pros and cons having a nucleoid.

A: Nucleus is an organelle present in a cell that houses the genetic material, DNA or RNA. It is the…

Q: What family gene means and How do you name a gene?

A: Mendel proposed that something was being passed down from the parents to offspring through the…

Q: What is a genetic cross?

A: Genetics is concerned with the study of genes and their heredity from parents to offspring. A…

Q: What is a genetic familytree?

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

Q: How do we know that chromosomes exist in homologous pairs?

A: The eukaryotic cells contain different organelles like lysosomes, mitochondria, Golgi apparatus,…

Q: What genetic principle could be derived from a monohybrid cross?

A: The genetics is the branch of biology that deals with the study of genes, genetic variation and…

Q: Given the end results of the two types of division, why is it necessary for homologs to pair during…

A: Cell cycle is a series of changes that occurs in a newly divided cell through which it duplicates…

Q: What’s a pedigree?

A: Genetics is a branch of biology which deals with the study of gene, genetic expression, variability,…

Q: what is Nullisomy?

A: Each cell in the body contains the 23 pairs of chromosome or total of 46 chromosome, half of which…

Q: How are twin studies of concordance and discordance related to pseudoalleles?

A: Genetics is the study of the functioning and main codes of variation and heredity. Inheritance is…

Q: Which of the following is true of polyploidy?

A: The option b is true i. e., polyploidy occurs in specialized cell types in many organisms.  The…

Q: Difference between monohybrid and dihybrid cross?

A: G. J. Mendel, also known as the Father of Genetics discovered the existence of genes during his…

Q: Why is the word homologous used to describe chromosome pairs, rather than the word identical?

A: Homologous chromosomes are the chromosomes that is acquired one from the paternal and another from…

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: What are compound heterozygotes?

A:

Q: What is trihybrid cross ?

A: Genetics is a part of science concerned about the investigation of genes, hereditary variety, and…

Q: Does "end A" represent the plus or the minus end? Explain. "A" End

A: End pA represent the plus end.

Q: What is inversion heterozygotes ?

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

Q: What is a special pair, and how does it function?

A: Photosynthesis is a process, during which green plants use light to produce sugar.

Q: what are duplication heterozygotes

A: Duplication (Dp) is a chromosomal rearrangement that leads to an increase in the number of a…

Q: What is a monohybrid cross?

A: Genetics is the branch of biology deals with the study of gene, genome and genetic abnormalities.…

Q: Define the class-aves and its structure?

A: Vertebrates are those organisms that have a spinal cord and it is surrounded by bone or cartilage.…

Q: What are main differences between Hypermorphic and  antimorphic?

A: Mutations are the alterations or the changes that occur in the DNA. Mutagens are the agents that are…

Q: What is a pedigree?

A: An organism is a living thing. It has an organized structure, and it can grow, react to stimuli,…

Q: What does genetic heterogeneity mean?

A: The genetics is the branch of biology that deals with the study of genes, genetic variation and…

Q: What do you mean by holandric genes?

A: The genes residing exclusively on the Y chromosomes are known as holandric genes. These genes are…

Q: Is a trisomic an aneuploid or a polyploid?

A: Trisomy is a genetic condition in which an extra chromosome or part of a chromosome is added to a…

Q: Explain what the word nondisjunction means?

A: Cell biology is the field of biology that studies the cell’s function and structure.

Q: what are allopolyploids.?

A: Every organism contains a definite amount of chromosomes, made up of DNA and protein, and is passed…

Q: In a tetraploid B /B /b /b, how many quadrivalent possiblepairings are there? Draw them (see Figure…

A: The number of sets of well define chromosome that is term as homologous chromosomes in a cell's or…

Q: What is Allotetraploid?

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

Q: What causes polyploidy?

A: Heredity as we know is the passing on of traits from parents onto their offsprings. Organisms that…

Q: What is a metacentric chromosome?

A: The deoxyribonucleic acid (DNA) molecules is packaged into thread-like structures in the nucleus of…

Q: What is a reciprocal cross?

A: A genetic cross is the process of mating of two individuals which describes the comparison of their…

Q: What is inversion heterozygote?

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

Q: Draw each of the following base pairs: A-T, G-C, and U-

A: Adenine, guanine, cytosine and thymine are the nitrogenous bases which are present in DNA and in RNA…

Q: What is a partial diploid?

A: The term diploid refers to the status of ploidy level in the cells of an organism. Ploidy is defined…

Q: What do you mean by hominoid stock?

A: Animal diversity and origin are the natural history about the animal forms. In the animal diversity,…

Q: In many organisms, including humans, chromosomes occur in homologous pairs; where does each member…

A: In higher organisms, chromosomes occur in homologous pairs. One chromosome of the pair from each…

Q: What do you mean by heterogametic? Give example?

A: A gamete is the reproductive cell of an organism. It can be an egg cell in a female or a sperm cell…

Q: What is the formula for a female with a Philadelphia chromosome?

A: Hi, Thanks For Your Question.  Answer : The Philadelphia chromosome Is A Specific Genetic…

Q: What is the difference between these two. How would the karytotype look like

A: Karyotype is a total collection of the chromosomes of a organism. For suppose the karytope of humans…

Q: What is an example of polyploidy?

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

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.