Reproduction in Yeast Cell

Our Objective 

Study the mode of reproduction in yeasts.  


The Theory 


Reproduction is the biological process by which an organism gives rise to young ones (offspring) similar to them. The offspring grow, mature and in turn produce new offspring. Reproduction takes place sexually and asexually. 

Sexual reproduction 

When two parents participate in the reproductive process and involve in fusion of male and female gametes, producing the offspring. It is called sexual reproduction. 

Asexual reproduction 

Asexual reproduction is the primary form of reproduction for single-celled organisms such as the archaea, bacteria, and protists. 

Asexual reproduction is a mode of reproduction when offspring is produced by a single parent with or without the involvement of gamete formation, the reproduction is asexual. The offspring will be the exact genetic copies of the parent. In Protists and Monerans, the organism or the parent cell divides into two to give rise to new individuals.  These organisms cell division is itself a mode of reproduction. Many single-celled organisms reproduce by binary fission, where a cell divides into two halves and each rapidly grows into an adult for example - Amoeba, Paramecium. 

In yeast, the division is unequal and small buds are produced that remain attached initially to the parent cell which, eventually gets separated and mature into new yeast organisms. 

Budding in Yeast 

They are eukaryotic, single-celled microorganisms which classified as members of the fungus kingdom. Yeast sizes vary greatly, depending on species and environment.  

The yeast species Saccharomyces cerevisiae converts carbohydrates to carbon dioxide and alcohols through the process of fermentation. 

Most yeasts reproduce asexually by mitosis, and many do so by the asymmetric division process known as budding.  In the process of budding in yeast, first it produces a small protuberance on the parent cell that grows to a full size and forms a bud. The nucleus of the parent cell splits into a daughter nucleus and migrates into the daughter cell. The bud detaches from the mother’s body by forming a constriction at the base. Budding will repeat to form a chain of bud cells. The daughter cell produced during the budding process is generally smaller than the mother cell. 

Learning Outcomes  

  • Students understand the term reproduction and the types of reproduction. 
  • Students understand the terms budding, binary fission and a few other terms. 
  • Students understand the different stages of budding in Yeast. 
  • Students understand the experiment better through the animated demonstration.