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Chromosomal Theory of Inheritance Video Lecture - NEET

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Video Timeline
Video Timeline
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00:04 Introduction
01:05 Father of Genetics - Gregor Mendel
03:18 Walter Sutton hypothesis
05:42 Chromosomal Theory of Inheritance
06:42 Chromosomes pairs or homologous pairs
08:29 Thomas Hunt Morgan's experiments
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FAQs on Chromosomal Theory of Inheritance Video Lecture - NEET

1. What is the chromosomal theory of inheritance?
Ans. The chromosomal theory of inheritance proposes that genes are located on chromosomes and that the behavior of chromosomes during cell division is responsible for the inheritance of traits from parents to offspring. This theory was first proposed by Thomas Hunt Morgan in the early 20th century.
2. How does the chromosomal theory of inheritance explain the inheritance of traits?
Ans. According to the chromosomal theory of inheritance, genes are located on chromosomes, which are passed from parents to offspring during reproduction. During the process of cell division, chromosomes undergo segregation and independent assortment, leading to the inheritance of specific combinations of genes that determine the traits of an individual.
3. What evidence supports the chromosomal theory of inheritance?
Ans. The chromosomal theory of inheritance is supported by several lines of evidence. One important piece of evidence is the observation of chromosomal abnormalities in individuals with genetic disorders. For example, individuals with Down syndrome have an extra copy of chromosome 21. Additionally, experiments in fruit flies conducted by Thomas Hunt Morgan and his colleagues provided further evidence by showing that specific traits are linked to specific chromosomes.
4. How does the chromosomal theory of inheritance explain sex determination?
Ans. The chromosomal theory of inheritance explains sex determination by the presence or absence of specific sex chromosomes. In humans, females have two X chromosomes (XX), while males have one X and one Y chromosome (XY). The presence of the Y chromosome determines maleness. This theory suggests that the genes responsible for male or female traits are located on the sex chromosomes and are inherited in a predictable manner.
5. What are some implications of the chromosomal theory of inheritance?
Ans. The chromosomal theory of inheritance has several implications in the field of genetics. It provides a foundation for understanding patterns of inheritance and the transmission of genetic disorders. It also explains the occurrence of genetic variations and allows for the study of genetic recombination and genetic mapping. Furthermore, this theory has paved the way for advancements in genetic engineering and the development of techniques such as gene therapy.
Video Timeline
Video Timeline
arrow
00:04 Introduction
01:05 Father of Genetics - Gregor Mendel
03:18 Walter Sutton hypothesis
05:42 Chromosomal Theory of Inheritance
06:42 Chromosomes pairs or homologous pairs
08:29 Thomas Hunt Morgan's experiments
More
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