What Is Terminalization?
Chromosomes in diakinesis will have undergone maximum condensation and appear thicker and shorter than at any other stage. As the... View Article
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In Diplotene Why Do Bivalents Appear In Different Shapes?
After the completion of crossing over and recombinations, synapse chromosomes begin to repel from one another during diplotene. However, the... View Article
How Crossing Over Between Non-sister Homologous Chromatids Can Produce Different Gene Combinations?
During pachytene, a mutual exchange of chromosomal material between non-sister chromatids of the bivalents occurs. This genetic exchange is called... View Article
Why Is The Pachytene Stage Referred To As The Tetrad Stage?
The pairing of homologous chromosomes is completed during the pachytene stage. As a result of continued condensation, chromosomes become much... View Article
Why Have Some Biologists Called Zygotene A Zipper Stage?
Zygotene is a stage of chromosome pairing. The homologous chromosomes (maternal and paternal chromosomes) come closer and start pairing together... View Article
Why Do We Resemble Our Family Members But Are Not Identical To Them Except In The Case Of Monozygotic Twins?
The importance of meiosis goes beyond maintaining chromosome number from one generation to the next. Meiosis also builds genetic variability... View Article
Why Do The Resulting Offspring Not Have Twice As Many Chromosomes As Their Parents?
If gametes contained the same number of chromosomes as other body cells, the chromosome number would double with each generation.... View Article
Why Is Meiosis Referred To As An Antithesis Of Fertilization?
Reproduction is one of the basic traits of life. Most multicellular organisms reproduce sexually. This involves the production of gametes... View Article
Why Cleavage Is Not Possible In Plant Cells?
Cleavage is not possible in plant cells as their rigid cell walls cannot be pulled inwards. As a result, in... View Article
Describe The Metaphase.
Metaphase is identified by the fully formed spindle. Because of the heavy coiling and dehydration, the chromosomes become short and... View Article
What Marks The End Of Prophase In Mitosis?
Simultaneous with the changes in the cytoplasm, the chromatin network of the nucleus becomes distinctly visible as chromosomes. They eventually... View Article
Why Is Mitosis In Animals Called Astral Mitosis?
The animal cell in the first stage of karyokinesis, almost doubles in size and typically becomes round as the cytoplasm... View Article
What Is Direct Cell Division?
Direct cell division or amitosis is a means of asexual reproduction in unicellular organisms such as protozoans. In this type... View Article
What Are The Events Taking Place During The Interphase?
Interphase lasts for a longer duration during which the following events occur – Chromosomal DNA duplicates and each chromosome is... View Article
Why Is Leptotene Called The Bouquet Stage?
Every chromosome has highly organized ends known as telomeres. They have a specific role in maintaining the individuality and stability... View Article
What Is The Hypothesis Of The Oxygen Revolution?
Some of the chemoautotrophs must have eventually developed chlorophyll like pigments by using magnesium porphyrin of the oceanic water. Such... View Article
What Is Karyotype And Idiogram?
A karyotype is the set of chromosomes contained in the nucleus of a species. It discloses the size, number, shape... View Article
Give The Classification Of Chromosomes Based On The Position Of The Centromere.
Based on the position of the centromere, chromosomes can be classified as follows – Type of chromosome Shape assumed Position... View Article
What Is The Significance Of Polyploid Plants?
The phenomenon of the occurrence of more than two haploid sets of chromosomes in a species is called polyploidy. It... View Article
What Is The Role Of The Centrosome?
The role of the centrosome is as follows – Centrosomes play an important role in cell division. Centrioles during cell... View Article
