generic · 12th TN - English Medium · ZOOLOGY · Page 61

4.7 Pedigree Analysis

Chapter 3: 4. Luteal or secretory phase · ZOOLOGY · EN medium

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Pedigree is a “family tree”, drawn with standard genetic symbols, showing the inheritance pathway for specific phenotypic characters. (Fig. . ). Pedigree analysis is the study of traits as they have appeared in a given family line for several past generations. Fig. . Symbols commonly used in pedigree charts Genetic Disorders A genetic disorder is a disease or syndrome that is caused by an abnormality in an individual DNA. Abnormalities can range from a small mutation in a single gene to the addition or subtraction of an entire chromosome or even a set of chromosomes. Genetic disorders are of two types namely, Mendelian disorders and chromosomal disorders.

📖 Class 12 Zoology English 2024 Edition www.tntextbooks.in · Page 61

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Pedigree is a “family tree”, drawn with standard genetic symbols, showing the inheritance pathway for specific phenotypic characters. (Fig. . ).

Pedigree analysis is the study of traits as they have appeared in a given family line for several past generations. Fig. . Symbols commonly used in pedigree charts Genetic Disorders A genetic disorder is a disease or syndrome that is caused by an abnormality in an individual DNA.

Abnormalities can range from a small mutation in a single gene to the addition or subtraction of an entire chromosome or even a set of chromosomes. Genetic disorders are of two types namely, Mendelian disorders and chromosomal disorders.

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