Chromosomal theory of inheritance, linkage, sex determination

Every individual is distinct because they possess a distinct set of characteristics. The characteristics that are passed down from one generation to the next during the process of fertilisation are referred to as hereditary characteristics. The rules of heredity have a role in determining how this heritage is passed along. Inherited characteristics are encoded in […]

Introduction The characters in the organisms are expressed by a pair of alleles known as gene. A allele can be dominant or recessive. The dominant allele expresses itself irrespective of the other gene present,while the recessive allele is only expressed in the presence of the second recessive allele. Definition The inheritance of blood groups means

Incomplete dominance results from a cross in which each parental contribution is genetically distinct, giving rise to progeny with an intermediate phenotype. Semi-dominance and partial dominance are other terms for incomplete dominance. Mendel described dominance but not partial dominance. If he had worked with Mirabilis jalapa instead of a pea, he would have considered crossing

Inbreeding depression is a term that refers to a drop or loss of fitness and strength that is mostly caused by inbreeding in a population. A simpler definition is that inbreeding depression occurs when relatives in a small population frequently mate, reducing the population’s ability to survive and reproduce. Inbreeding depression is a term used

By analogy, the term ‘inbreeding’ refers to the genetic abnormalities and other effects that can result from the expression of negative or recessive traits resulting from incestuous sex relations and consanguinity.Inbreeding causes homozygosity, which increases the chances of negative or recessive traits affecting offspring, usually reducing a population’s biological fitness or survival and reproduction, at

Osteichthyes is a classification that contains all bony fishes. Osteichthyes are cold-blooded vertebrates, like other fishes, which breathe through gills and even swim with the help of their flippers or fins. There are various characteristics that characterise bony fishes, including a bone skeleton, scales, paired fins, one set of gill openings, a pair of nostrils,

Humans have an advanced brain that is capable of abs Their appreciation for beauty and aesthetics, combined with the human desire for self-expression, has resulted in cultural innovations such as art, literature, and music. Humans are known for their altruistic behaviour not only toward relatives but also toward others, including sometimes enemies and competitors. Males

The human genome is a comprehensive collection of nucleic acid sequences that are exclusive to humans. It is encoded as DNA in the 23 chromosome pairs present in cell nuclei and in a tiny DNA molecule found in each mitochondria. Typically, these are considered separately as the nuclear and mitochondrial genomes. Human genomes contain both

Diseases caused by abnormalities in one or more genes are known as genetic disorders. In some cases, gene mutations might cause an embryo to die before it can be born. These mutations arise in development-related gees, and they frequently stop an embryo’s development in its early stages. Genetics Disorders:- When a mutation (a negative modification

Homozygous means that an organism has the same two copies of a gene, whereas heterozygous means that an organism has different copies of a gene for a certain feature. These creatures are referred to as homozygote and heterozygote in plant and animal reproduction. Source of homozygous and heterozygous Both homozygous and heterozygous derive from the root zygo-, which