$(10 x$
Choose a word/term from COLUMN B that matches a description in COLUMN A. Write only the letter (A-H) next to the question numbers (1.2 to 1.2 .5 ) in the ANSWER BOOK, e.g. 1.2 .6 K .
COLUMN A
COLUMN B
1. 2. 1 A characteristic represented by $X ^{ h } Y$ with $X ^{ H } X ^{\text {h}}$-genotype
2. 2. 2 The transfer of characteristics from parents to offspring
3. 2. 3 The farm animal that determines the sex of a calf
4. 2. 4 Quantity of products supplied exceeds quantity demanded sells the same product in different ways to
A Heredity
Answer (1)
1.2.2 matches with A (Heredity).
No other matches can be made with the provided options.
The answer is that only 1.2.2 matches with A.
Therefore, the final answer is: $\boxed{A}
Explanation
Analyzing the Problem We need to match the descriptions in Column A with the terms in Column B. Let's analyze each description one by one.
Analyzing 1.2.1 1.2.1 A characteristic represented by X h Y with X H X h -genotype: This refers to a sex-linked trait where males have one X chromosome and one Y chromosome. The superscript 'h' likely indicates a recessive allele. The genotype X H X h indicates a female carrier. This description seems related to sex-linked inheritance. However, none of the options in Column B directly match this description. We will proceed with the other descriptions and come back to this if needed.
Analyzing 1.2.2 1.2.2 The transfer of characteristics from parents to offspring: This is the definition of heredity. So, 1.2.2 matches with A.
Analyzing 1.2.3 1.2.3 The farm animal that determines the sex of a calf: In mammals, including farm animals like cattle, the male determines the sex of the offspring. This is because the female has two X chromosomes (XX), while the male has one X and one Y chromosome (XY). The sperm from the male carries either an X or a Y chromosome, determining whether the offspring is female (XX) or male (XY). Therefore, the farm animal that determines the sex of a calf is the bull. However, 'bull' is not an option in Column B.
Analyzing 1.2.4 1.2.4 Quantity of products supplied exceeds quantity demanded: This describes a situation of surplus in economics. However, none of the options in Column B directly match this description.
Re-examining Column B Let's re-examine the options in Column B and see if any of them could fit the descriptions in Column A. Column B contains: A. Heredity. Given our analysis above, 1.2.2 matches with A.
Final Analysis Since 1.2.2 matches with A (Heredity), we need to find matches for 1.2.1, 1.2.3, and 1.2.4 from the remaining options. However, none of the remaining options seem to fit the descriptions. It seems there might be missing options in Column B. Since we can only choose from the provided options, and only 1.2.2 has a clear match, we will proceed with that.
Examples
Understanding heredity is crucial in agriculture for selective breeding. Farmers use the principles of heredity to improve crop yields and livestock traits. For example, by selectively breeding cows that produce more milk, farmers can increase the overall milk production of their herd. This application of heredity helps ensure a more efficient and productive agricultural system.
