Chromosomal theory of inheritance, linkage, sex determination

Heredity and Variation: Mendelian Inheritance

Introduction Heredity is the passing on of characteristics from one generation to the next. it’s due to why offspring seem to be like their parents. It conjointly tells the explanation why cats invariably provide birth to kittens Associate in nursing ne’er puppies. As the universal truth, the method of heredity happens among all living organisms, […]

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

Heredity

The process of transferring traits and characteristics from parents to kids through genes is known as heredity or hereditary. The offspring inherit their mother and father’s qualities and attributes, which are genetic information. The reason you look so much like your parents is due to heredity and genetics. Genetics is a field of science that

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

Hardy Weinberg Law

G H Hardy and Wilhelm Weinberg are the namesakes of the legislation. They were pioneers in the mathematical illustration of this principle, which is also known as the Hardy–Weinberg equilibrium, theorem, law or model, among other names. It was the core focus of Hardy’s thesis to disprove the belief that was prevalent at the time

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

Neurological Cretinism

Cretinism is said to be the most dangerous intellectual and developmental disability (IDD). Cretinism occurs when a pregnant woman has a severe iodine deficiency. It is usually seen as one of the causes of underactive thyroid function at birth. It is kept untreated then it can hamper one’s physical and mental development. Enlarging tongue, protruding

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

GENETICS AND EVOLUTION

Evolution is the method by which populations of organisms change over generations. Genetic variations come under these changes. Genetic variations can arise from variants of genes which are also called mutations or from a general process in which genetic material is rearranged as a cell is getting ready to divide known as genetic recombination. Genetic

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

Genetic variations

Differences in the genomes of individuals of the same species are referred to as genetic variation. An organism’s genome contains all of its hereditary information—all of its genes. The human genome, for example, includes between twenty and twenty-five thousand genes. Genes are genetic information units that contain instructions for constructing proteins. Cells operate because of

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

GENETIC VARIATION

INTRODUCTION Genetic variation occurs when the genetic makeup of organisms within a population changes. Genes are inherited DNA segments that contain protein-making instructions. Alleles are different versions of genes that determine distinct traits that can be passed down from parents to offspring. Genetic variation refers to differences in the genetic makeup of individuals within a

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

Multiple alleles and Inheritance of Blood groups

Alleles  There are traits in humans and other organisms that have three or more different types of alleles (genes). When a trait has three or more distinct alleles, we see it as having multiple allele inheritance. The human ABO blood type allele or trait is an example of a trait with multiple alleles. Three different

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

GENETIC EVOLUTION

It is the process of heritable changes in the population of organisms that occurs over a period of numerous generations of time. During reproduction, the expression of genes is replicated and passed on to the offspring, resulting in the inheritance of inherited features. The heritable traits that are beneficial for survival and reproduction become more

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET

Genetic drift vs. Gene flow

In terms of their contrasts, gene flow is especially concerned with the migration of populations, whereas genetic variation is concerned with the alteration induced by the introduction or elimination of an allele. Genetic drift, on the other hand, is concerned with the shift in allele frequencies that occurs as a result of random sampling from

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Biology, Chromosomal theory of inheritance, linkage, sex determination, Class 12, Genetics and Evolution, NEET