Study the following statements regarding inbreeding and select the inc...
Inbreeding strategies allow the desirable qualities of more closely related individuals to be continued within the same breed for 4-6 generations. It increases homozygosity and thus, is necessary for evolving a pure line. Continued inbreeding, especially close inbreeding usually leads to reduces fertility and even productivity. This is called inbreeding depression.
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Study the following statements regarding inbreeding and select the inc...
Inbreeding is a breeding strategy in which closely related individuals are mated with each other. This can lead to both positive and negative effects on the offspring. Let's analyze each statement given and determine which ones are incorrect.
(i) The inbreeding strategies allow the desirable qualities of two different breeds to be combined.
- This statement is correct. Inbreeding can be used to bring together the desirable traits of two different breeds by mating individuals that possess those traits. This can help create a population with a specific set of desirable characteristics.
(ii) It increases homozygosity.
- This statement is correct. Inbreeding leads to an increase in homozygosity, which means that the offspring are more likely to have two identical alleles for a particular gene. This is because closely related individuals are likely to have similar alleles, and mating them increases the chances of those alleles being passed on to the offspring.
(iii) It also helps in the elimination of less desirable genes.
- This statement is correct. Inbreeding can help in the elimination of less desirable genes by increasing the expression of negative recessive alleles. When closely related individuals are mated, there is a higher chance of these recessive alleles being expressed in the offspring. This allows breeders to identify and remove individuals carrying these undesirable traits from the breeding population.
(iv) Continued inbreeding increases fertility and productivity.
- This statement is incorrect. Continued inbreeding can actually lead to a decrease in fertility and productivity. As homozygosity increases, the likelihood of harmful recessive alleles being expressed also increases. This can result in reduced fertility, increased susceptibility to diseases, and decreased overall productivity of the population.
Based on the analysis above, the incorrect statements are (i) and (iv). Option (D) states that both (i) and (iv) are incorrect, so it is the correct answer.
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