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Inheritance Patterns in Humans

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Questions and Answers

What is the primary objective of pedigree analysis in studying inheritance patterns in humans?

To study the effect of environmental factors on inherited traits
To analyze the expression of a trait in a single generation
To identify the type of inheritance pattern of a gene (correct)
To determine the genotype of an individual

What is a key difference between autosomal and sex-linked genes in terms of their inheritance patterns?

Autosomal genes are always recessive, while sex-linked genes are always dominant
Autosomal genes are always dominant, while sex-linked genes are always recessive
Autosomal genes affect both males and females equally, while sex-linked genes affect males more than females (correct)
Autosomal genes affect only males, while sex-linked genes affect only females

What is a characteristic of a sex-linked recessive gene?

It is passed from father to daughter
It is passed from father to grandson through the daughter (correct)
It is passed from mother to son
It is passed from mother to daughter

What is the main limitation of studying inheritance patterns in humans compared to Mendel's experiments?

The lack of controlled crosses (B) Signup and view all the answers

What is the term for the tabular representation of a family history used to determine the type of inheritance pattern of a gene?

Pedigree analysis (C) Signup and view all the answers

What is a characteristic of a sex-linked dominant gene?

It is never transferred from father to son (A) Signup and view all the answers

What was the main purpose of Gregor Mendel's study on pea plants?

To understand the fundamental principles of heredity (B) Signup and view all the answers

What is the key concept that was refuted by Mendel's work on pea plants?

The concept of blending inheritance (A) Signup and view all the answers

Which of the following is an example of an inherited trait?

A person's eye color (B) Signup and view all the answers

What is the term for the study of the inheritance patterns of human traits?

Pedigree analysis (C) Signup and view all the answers

What is the law of independent assortment?

The law that states that each pair of alleles segregates independently of the other pairs (A) Signup and view all the answers

What is the difference between a dominant and recessive gene?

A dominant gene is always expressed, while a recessive gene is never expressed (D) Signup and view all the answers

What is the primary purpose of cross-fertilization in Mendel's experiments?

To allow pollen from one plant to fertilize the ovule of another plant (D) Signup and view all the answers

What is the term for the specific properties of a character?

Trait (C) Signup and view all the answers

Why did Mendel test his strains to determine if their characters bred true?

To determine if a trait did not vary in appearance from generation to generation (B) Signup and view all the answers

What is the term for a variety that continues to produce the same characteristic after several generations of self-fertilization?

True-breeding line (C) Signup and view all the answers

Why did Mendel study seven characters that bred true?

To understand the inheritance of multiple traits (B) Signup and view all the answers

What is the primary advantage of self-fertilization in Mendel's experiments?

It produces a true-breeding line (A) Signup and view all the answers

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