Progeny is heterozygous in case of

Options

A. Mutation
B. Autopoloidy
C. Hybridisation
D. Selective breeding

Answer

To determine when progeny is heterozygous, we need to analyze the options provided and understand the genetic concepts involved. Here’s a step-by-step solution:

### Step 1: Understand the Definition of Heterozygous
Heterozygous refers to having two different alleles for a particular gene. For example, if an organism has one dominant allele (A) and one recessive allele (a), it is heterozygous (Aa).

**Hint:** Remember that heterozygosity involves different alleles at a gene locus.

### Step 2: Analyze the Options
We have four options to consider: mutation, autoploidy, hybridization, and selective breeding.

**Hint:** Look at how each process affects genetic variation in progeny.

### Step 3: Evaluate Mutation
In the case of mutation, there is an alteration in the genetic material. However, mutations can lead to either homozygous or heterozygous conditions, and they do not specifically guarantee heterozygosity in progeny.

**Hint:** Consider whether mutations create new alleles or simply change existing ones.

### Step 4: Evaluate Autopolyploidy
Autopolyploidy involves the duplication of the same set of chromosomes, which typically results in a homozygous condition rather than heterozygous. Thus, this option is also incorrect.

**Hint:** Remember that autopolyploidy increases chromosome number but does not create different alleles.

### Step 5: Evaluate Hybridization
Hybridization is the process of crossing two different varieties or species, which often results in offspring that are heterozygous for certain traits. This is because hybridization combines different alleles from the parent organisms, leading to genetic diversity.

**Hint:** Think about how crossing different species or varieties can introduce new genetic combinations.

### Step 6: Evaluate Selective Breeding
Selective breeding involves choosing specific parents to produce desired traits in offspring. While it can lead to some heterozygosity, it often focuses on enhancing homozygosity for specific traits, making it an unreliable option for guaranteeing heterozygosity.

**Hint:** Consider whether selective breeding is aimed at increasing or decreasing genetic variation.

### Conclusion
Based on the analysis, the correct answer is that progeny is heterozygous in the case of **hybridization**.

**Final Answer:** Progeny is heterozygous in case of hybridization.