Mendelian Genetics Concepts

In the 19th century, Gregor Mendel, an Augustinian monk, conducted experiments on pea plants to explore biological inheritance. He discovered that traits are inherited in specific numerical ratios, leading to the concepts of dominance and segregation. Mendel's work laid the foundation for genetics, revealing that traits are determined by pairs of factors, now known as genes. His findings showed that certain traits, termed Mendelian traits, can reappear in subsequent generations, influencing both innocuous characteristics and serious illnesses.

What was one of Gregor Mendel's main scientific interests?

• Astronomy

• Biological inheritance

• Physics

• Chemistry

Why did Mendel choose to work with garden peas?

• They were inexpensive

• They were easy to grow

• They had a short life cycle

• He found it enjoyable

What unexpected result did Mendel observe when he crossed round and wrinkled peas?

• Offspring were neither round nor wrinkled

• All offspring were wrinkled

• All offspring were round

• Offspring were a mix of round and wrinkled

What did Mendel discover about the characteristics of the second generation of peas?

• They were a new type of pea

• They included both round and wrinkled peas

• They were all wrinkled

• They were all round

What concept did Mendel's experiments help to establish?

• Photosynthesis

• Evolution

• Dominance and segregation

• Cell division

What did Mendel refer to as 'factors'?

• Genes

• Cells

• Chromosomes

• Proteins

What determines whether a trait is dominant or recessive according to Mendel?

• The combination of factors

• The age of the organism

• The environment

• The size of the organism

What is a Mendelian trait?

• A trait influenced by multiple genes

• A trait that is always recessive

• A trait that is always dominant

• A trait caused by a single gene

Which of the following is an example of a Mendelian trait?

• Height

• Eye color

• Freckles

• Skin tone

What serious illness can be linked to Mendelian traits?

• Diabetes

• Cystic fibrosis

• Heart disease

• Asthma