Y-Linked (Holandric) Characters

Question Question

Genes for testis-determining factor (TDF) and hypertrichosis are present on the Y-chromosome and are inherited only through the male line. Such characters are known as:

Select an answer

Hologenic character
Diandric character
Holandric character
Diagenic character

Y-Linked (Holandric) Characters

Genes for testis-determining factor (TDF) and hypertrichosis are present on the Y-chromosome and are inherited only through the male line. Such characters are known as:

Options

Hologenic character
Diandric character
Holandric character ✓
Diagenic character

Correct Answer: C

Explanation in English

Correct Answer: Holandric Character

From the notes (Table 7 — Non-criss-cross inheritance): Holandric characters have genes on the Y-chromosome and are inherited exclusively through the male line.

Y-Linked (Holandric) Inheritance Pattern

Father → Son → Grandson (ALL sons are affected; NO daughters are ever affected)

Examples (from notes)

TDF (Testis-Determining Factor): Located on Y chromosome; triggers male sexual differentiation
Hypertrichosis: Excess hair growth on ear pinna (outer ear)

Four Types of Sex-Linked Inheritance (Table 7)

Diagenic (Criss-cross): Father → Daughter → Grandson
Diandric (Criss-cross): Mother → Son → Granddaughter
Holandric (Non-criss-cross): Father → Son → Grandson ✔
Hologenic (Non-criss-cross): Mother → Daughter → Granddaughter

📚 About this Topic — Animal Genetics & Breeding

This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.

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