Question

Q1.Which would be the worse situation for an animal breeder if their goal was to make improvements in a specific trait

A) They want to improve a trait that is quantitative. There is genetic variation among individuals for the genes controlling the trait the breeder would like to improve but the trait is also highly influenced by environment.

B) They want to improve a trait that is quantitative. There is genetic variation among individuals for the genes controlling the trait the breeder and if the breeder can collect a large amount of data which helps them make better selection based on an animals genotype.

C) The trait they want to improve is qualitative. All the individuals they are working have identical genes that control the trait they want to improve.

Q2. Which animals can breeding be applied to in order to change or improve the traits in the animal.

A)mammals

B)birds

C)fish

D)ALL OF THE ABOVE

Q3. Which of the follow best describes selection and breeding for a quantitative trait.

A) makes no selection of parents but manages the environment of the animals so that they maximize the expression of the desired trait.

B) the breeder selects parents with the desired trait and gradually, over several or many generations, the individuals have an improvement in the trait even if environment is kept the same

C) the breeder selects parents with the desired trait and in a few generations, all the animals they work with have this same desired trait.

Answer 1

Question-1: answer: A) They want to improve a trait that is quantitative. There is genetic variation among individuals for the genes controlling the trait the breeder would like to improve but the trait is also highly influenced by environment.

Reason:

Heritability has main impact in selection appropriate phenotypic train before breeding bur the major error produced with environmental effects on the required gene. Finally result in heritable changes with gene variations. These are going to produce errors in the desired phenotypic trait for which the breeder want to improve a trait is quantitative. There is genetic variation among individuals for the genes controlling the trait the breeder would like to improve but the trait is also highly influenced by environment. The prediction made by the Breeder;s equation (R = h2S) illustrated that syllogism parallel predominantly with Breeder’s equation in predicting heritability of the generation. Mainly the prediction in explaining natural selection using a deck of cards are if the individual differ in a particular trait due to environmental effect and possess genetic basis. Secondly, Environment has potential impact on the organism survival and reproductive fitness to generate a new phenotype wit required heritable changes. Thirdly, these genetic changes leading to increase in frequency of individuals with required traits associated with increased fitness.

Q2. Which animals can breeding be applied to in order to change or improve the traits in the animal.

Answer:

C)fish