Science Practice Quiz 69

Q1.The amount of plant hormone made depends on what factor?

A. The plant's age B. The efficiency of the process for making it C. The colour of the plant's flowers D. The number of leaves

Q2.If an enzyme important for plant hormone production works efficiently, what is the likely outcome for the plant?

A. The plant will be short due to less hormone. B. The plant will be tall due to a lot of hormone. C. The plant will produce more seeds. D. The plant will have wrinkled leaves.

Q3.What happens if the gene for an enzyme involved in plant hormone production has an alteration that makes the enzyme less efficient?

A. The plant will become taller. B. The plant will produce more hormones. C. The plant will be short due to less hormone. D. The plant's seeds will change shape.

Q4.In sexual reproduction, how do both parents contribute to the DNA of the progeny, according to the Mendelian interpretations?

A. Only one parent contributes DNA. B. Both parents contribute unequally. C. Both parents contribute equally. D. DNA contribution is random.

Q5.How many sets of genes does each pea plant typically have, and from where are they inherited?

A. One set, inherited from a single parent. B. Two sets, both inherited from the mother. C. Two sets, one inherited from each parent. D. Three sets, inherited from multiple ancestors.

Q6.For the mechanism of heredity to work, how many gene sets must each germ cell possess?

A. Two gene sets B. Only one gene set C. Multiple gene sets D. No gene sets

Q7.What would be the consequence if progeny plants inherited a single whole gene set from each parent?

A. The characteristics would be independently inherited. B. The characteristics would be linked and not independently inherited. C. The plants would become sterile. D. The F1 generation would show new combinations.

Q8.How many copies of each chromosome are typically present in a cell, and from which parents are they inherited?

A. One copy, from the mother only B. One copy, from the father only C. Two copies, one from each parent D. Two copies, both from the mother

Q9.What is the characteristic number of chromosomes a germ-cell takes from each pair during inheritance?

A. One chromosome B. Two chromosomes C. Half a chromosome D. Three chromosomes

Q10.What is the outcome when two germ cells combine in terms of chromosome number and species stability?

A. They reduce the chromosome number, destabilizing the species DNA B. They restore the normal chromosome number, ensuring DNA stability C. They double the chromosome number, leading to new species D. They maintain the reduced chromosome number, causing genetic variation

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Science Practice Quiz 69