Question:
Choose the correct statements among the following
A) Genes which code for a pair of contrasting traits are called homozygous.
B) Through artificial selection and domestication from ancestral wild cows, Sahiwal cows in Punjab were identified.
C) An organism of dominant phenotype is crossed with a recessive parent to predict the genotype of test organism.
D) Mendal developed the graphical representation to indicate all possible union of gamets.
Choose the correct statements among the following
A) Genes which code for a pair of contrasting traits are called homozygous.
B) Through artificial selection and domestication from ancestral wild cows, Sahiwal cows in Punjab were identified.
C) An organism of dominant phenotype is crossed with a recessive parent to predict the genotype of test organism.
D) Mendal developed the graphical representation to indicate all possible union of gamets.
A) Genes which code for a pair of contrasting traits are called homozygous.
B) Through artificial selection and domestication from ancestral wild cows, Sahiwal cows in Punjab were identified.
C) An organism of dominant phenotype is crossed with a recessive parent to predict the genotype of test organism.
D) Mendal developed the graphical representation to indicate all possible union of gamets.
Show Hint
A test cross always uses a homozygous recessive parent.
If the offspring ratio is 1:1, the dominant parent was heterozygous. If all offspring show the dominant trait, the parent was homozygous.
If the offspring ratio is 1:1, the dominant parent was heterozygous. If all offspring show the dominant trait, the parent was homozygous.
Updated On: Jul 22, 2026
- A, B
- B, C
- A, D
- C, D
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
The question asks us to identify the correct genetics and plant/animal breeding statements from the four options provided.
Step 2: Key Concepts and Approach:
We evaluate definitions of alleles, historical animal breeding examples, the mechanism of test crosses, and the origin of the Punnett square.
Step 3: Detailed Explanation:
• Statement A: Genes that code for a pair of contrasting traits are called alleles, not homozygous (which refers to having identical alleles for a gene). This statement is incorrect.
• Statement B: Sahiwal is a famous breed of dairy cattle.
It was developed through artificial selection and selective breeding of ancestral wild cattle in the Punjab region. This statement is correct.
• Statement C: To determine whether an individual showing a dominant phenotype is homozygous (TT) or heterozygous (Tt), it is crossed with a homozygous recessive parent (tt). This is called a test cross. This statement is correct.
• Statement D: The graphical representation used to calculate the probability of all possible genotypes of offspring in a genetic cross was developed by the British geneticist Reginald C. Punnett, not Gregor Mendel. This statement is incorrect.
Step 4: Final Answer:
Statements B and C are correct, making option (B) the correct choice.
The question asks us to identify the correct genetics and plant/animal breeding statements from the four options provided.
Step 2: Key Concepts and Approach:
We evaluate definitions of alleles, historical animal breeding examples, the mechanism of test crosses, and the origin of the Punnett square.
Step 3: Detailed Explanation:
• Statement A: Genes that code for a pair of contrasting traits are called alleles, not homozygous (which refers to having identical alleles for a gene). This statement is incorrect.
• Statement B: Sahiwal is a famous breed of dairy cattle.
It was developed through artificial selection and selective breeding of ancestral wild cattle in the Punjab region. This statement is correct.
• Statement C: To determine whether an individual showing a dominant phenotype is homozygous (TT) or heterozygous (Tt), it is crossed with a homozygous recessive parent (tt). This is called a test cross. This statement is correct.
• Statement D: The graphical representation used to calculate the probability of all possible genotypes of offspring in a genetic cross was developed by the British geneticist Reginald C. Punnett, not Gregor Mendel. This statement is incorrect.
Step 4: Final Answer:
Statements B and C are correct, making option (B) the correct choice.
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