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Heredity Video Lecture | Science Class 10
FAQs on Heredity Video Lecture - Science Class 10
| 1. What is heredity and why is it important in biology? |  |
Ans.Heredity is the biological process through which traits and characteristics are passed from parents to their offspring through genes. It is important in biology because it helps to explain the similarities and differences observed among individuals, the inheritance of genetic disorders, and the evolution of species over time.
| 2. What are the main types of inheritance patterns? | |
Ans.The main types of inheritance patterns include:
1. <b>Autosomal dominant inheritance</b> - where only one copy of a dominant allele is needed for the trait to be expressed.
2. <b>Autosomal recessive inheritance</b> - where two copies of a recessive allele are needed for the trait to be expressed.
3. <b>Sex-linked inheritance</b> - where genes are located on the sex chromosomes, affecting traits differently in males and females.
| 3. How do Mendel's laws of inheritance apply to heredity? | |
Ans.Mendel's laws of inheritance, including the Law of Segregation and the Law of Independent Assortment, describe how alleles segregate from each other during gamete formation and how different traits are inherited independently. These laws form the foundation of classical genetics and explain how traits are passed on from generation to generation.
| 4. What role do chromosomes play in heredity? | |
Ans.Chromosomes are structures within cells that contain DNA, which carries genes. They play a crucial role in heredity as they ensure the proper distribution of genetic material during cell division. Each parent contributes one set of chromosomes to their offspring, which determines the genetic makeup and traits of the individual.
| 5. Can environmental factors influence heredity? | |
Ans.Yes, environmental factors can influence heredity through a process known as epigenetics. While the genetic code remains unchanged, external factors such as nutrition, stress, and exposure to toxins can affect gene expression, leading to variations in traits that may not be directly inherited but can influence the offspring's characteristics.
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