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Biotechnology and Molecular Genetics in Plant and Animal Breeding Introduction

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Biotechnology and Molecular Genetics in Plant and Animal Breeding Introduction

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Questions and Answers

What was the significance of T.H. Morgan's work in genetic mapping?

He proposed the theory of meiotic crossing over

He introduced the concept of positive mutations driving evolution

He developed genetic maps based on relative gene positions (correct)

He discovered the process of synapsis during meiosis

Which event in the 1940s led to the combining of Mendelian genetics, Darwinism, and population genetics?

Three-factor crosses to determine gene distance

Modern synthesis (correct)

Introduction of positive mutations as drivers of evolution

Discovery of meiotic crossing over

What is the primary function of mutations in the context of evolution?

To disrupt the process of synapsis

To prevent meiotic crossing over

To maintain stable gene positions

To introduce genetic variability (correct)

How did Janssen contribute to our understanding of genetic variability?

By describing meiotic crossing over between chromosomes Signup and view all the answers

What did Rudolf Virchow contribute to cytogenetics?

He introduced the concept of invisible factors determining organism traits Signup and view all the answers

What key concept of Mendel's first law involves the phenotype of a cross being intermediate?

Incomplete dominance Signup and view all the answers

Which statement best summarizes Mendel's second law of independent segregation?

Genes segregate independently during gamete formation Signup and view all the answers

What conclusion did Mendel draw regarding the appearance and genetic composition of individuals?

Genetic composition determines appearance Signup and view all the answers

Which ancient Greek philosopher proposed the theory of preformation, suggesting that the embryo in its entirety already exists in the semen?

Anaxagoras Signup and view all the answers

Karl Ernst von Baer developed four rules about embryonic development. One of the rules states that:

The more general characters of a large group appear earlier in the embryo than the more special characters. Signup and view all the answers

Who is best known for the discovery and explanation of the structure of the chick germ layers?

Christian Heinrich Pander Signup and view all the answers

Which scientist theorized about the inheritance of acquired characteristics?

Hippocrates Signup and view all the answers

According to Aristotle, genetic material is only provided by which gender of individuals?

Males Signup and view all the answers

Who conducted groundbreaking work on chicken embryos?