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

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 is the role of monoadelphous,diadelphous,polyadelphous?

A: A flower is a modified shoot which is responsible for the sexual reproduction in angiosperms. In a…

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 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: How are chromosomes named on the basis of their centromere placement?

A: A chromosome is a thread-like structure that exists in living cells. It is made up of genetic…

Q: How to detect a loss of heterozygosity?

A: Step 1 The loss of heterozygosity (LOH) can also be a cross chromosome phenomenon. The loss of…

Q: What are   most common types of aneuploidy?

A: The presence of an abnormal chromosomal number in a cell is called aneuploidy. The presence of an…

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 is the relationship between nondisjunction and aneuploidy?

A: A karyotype represent all chromosomes that are found in an organism. In human beings, there are 23…

Q: each member of the gene pair come from?

A: Diploid organisms have a pair of genes

Q: What is genetic linkage?

A: During the meiosis process of sexual reproduction, DNA sequences that are similar together on a…

Q: which are the two genes are said to be syntenic?

A: Genes are the basic structural and functional units of heredity. They are composed of…

Q: How would you make a monoploid plantlet by starting with a diploid plant?

A: A Monoploid is an individual with one set of chromosomes and an individual with two set…

Q: Why are inversions and reciprocal translocations less likely to belethal than are aneuploidy,…

A: Every living species have two types of cells, somatic cells (diploid) which are responsible for…

Q: What are Sex-linkage?

A: Sex linkage is the phenotypic expression of a trait governed by the presence of the mutations in the…

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 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: What are compound heterozygotes?

A:

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 the Law of Independent Assortment and how does this “law” relate to meiosis?

A: Introduction :- The alleles of two (or more) distinct genes are sorted into gametes independently of…

Q: Three-fourths of this generation are tall, but which ones are heterozygotes?

A: In Mendelian inheritance of monohybrid cross, the two organisms with a different variations on one…

Q: What are trans-heterozygotes? Explain with examples

A: Heterozygote is a cell, which possess two different alleles for a specific gene in diploid organism.

Q: Where do centromeres dissolve in meiosis?

A: Meiosis is a kind of cell division occurring in the germ cells of the body that gives rise to four…

Q: How is a nucleoid different from a cell nucleus?

A: Cell is a basic structural and functional unit of all life forms. All organisms are made of at least…

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: what are allopolyploids.?

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

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 are the number of chromosomes in mustard weed?

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

Q: If two chromosomes of a species are the same length and have similar centromere placements and yet…

A: Chromosomes are carriers of genetic information. They are the physical units that transfer genetic…

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.