Science Practice Quiz 68

Q1.What unique methodological approach did Gregor Johann Mendel adopt, which distinguished his work from earlier studies on inheritance and helped him formulate the laws of inheritance?

A. Using advanced microscopy techniques. B. Conducting experiments on human subjects. C. Keeping a quantitative count of individuals exhibiting specific traits in each generation. D. Cross-breeding different species of plants.

Q2.If 'T' represents the allele for tallness and 't' represents the allele for shortness in pea plants, which of the following genotypes would result in a tall plant?

A. Only tt B. Only TT C. Both TT and Tt D. Only Tt

Q3.According to Mendelian experiments discussed in the text, which of the following traits are inherited independently in pea plants?

A. Shape and colour of seeds B. Height and flower position C. Pod shape and pod colour D. Seed texture and stem length

Q4.When a tall plant with round seeds is bred with a short plant with wrinkled seeds, what do the F1 progeny look like?

A. All short with wrinkled seeds B. All tall with round seeds C. Some tall with wrinkled seeds, some short with round seeds D. All tall with wrinkled seeds

Q5.Based on the Mendelian experiment described, which of the following are identified as dominant traits?

A. Shortness and wrinkled seeds B. Tallness and wrinkled seeds C. Shortness and round seeds D. Tallness and round seeds

Q6.When F1 progeny from a cross between a tall plant with round seeds and a short plant with wrinkled seeds are self-pollinated to generate F2 progeny, what new combinations of traits can be observed?

A. Only tall plants with round seeds and short plants with wrinkled seeds B. Tall plants with wrinkled seeds and short plants with round seeds C. Only tall plants with wrinkled seeds D. Only short plants with round seeds

Q7.What is the primary function of cellular DNA according to the provided text?

A. To provide energy for the cell B. To store waste products C. To act as the information source for making proteins D. To regulate cell division only

Q8.What is a 'gene' defined as in the context of heredity?

A. A complete chromosome B. A section of DNA that provides information for one protein C. The entire genetic material of an organism D. A specific type of protein

Q9.How do proteins primarily influence the characteristics or traits of an organism?

A. By directly forming the physical structure of the trait B. By controlling the characteristics that we are discussing here C. By acting as a storage unit for genetic information D. By initiating cell replication

Q10.What factor is directly responsible for determining plant height, as exemplified in the text?

A. Amount of sunlight received B. Amount of a particular plant hormone C. Soil nutrient content D. Presence of specific enzymes only

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Science Practice Quiz 68