Chicken Phenotype and Genotype

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Questions and Answers

Which reproductive biotechnology is NOT used to manipulate the reproductive process in cattle, carabaos, horses, and goats?

  • Oocyte culture
  • Cloning
  • In vitro fertilization
  • Pure breeding (correct)

What is the recommended system of breeding for improving native pigs?

  • Inbreeding
  • Upgrading (correct)
  • Crossbreeding
  • Pure breeding

What causes inbreeding depression in most reproductive traits in farm animals?

  • Parent-offspring mating (correct)
  • Outcrossing
  • Species hybridization
  • Overbreeding

What is the average gestation period of a sow?

<p>148 days (A)</p> Signup and view all the answers

What type of breeding involves mating a native doe with an Anglo-Nubian buck?

<p>Upgrading (C)</p> Signup and view all the answers

What is the result of the interaction between the genotype of an individual and the environment in which it is raised?

<p>G X E interaction (C)</p> Signup and view all the answers

What is the term for the non-genetic factors affecting an individual?

<p>Environment (A)</p> Signup and view all the answers

What is the mathematical expression for the relationship between the genotype, environment, and phenotype?

<p>P = G + E + (GxE) (B)</p> Signup and view all the answers

What is the result of the gene expression in an individual?

<p>Phenotype (D)</p> Signup and view all the answers

What is the term for one of two or more alternative forms of a gene?

<p>Alleles (C)</p> Signup and view all the answers

What is the type of gene action where genes govern the expression of a phenotype in a measurable way?

<p>Additive Gene Action (C)</p> Signup and view all the answers

What is the frequency of the allele for white wool in the sheep population?

<p>0.19 (D)</p> Signup and view all the answers

What is the percentage of heterozygous individuals in the sheep population?

<p>36% (D)</p> Signup and view all the answers

What is the frequency of the recessive allele bu in the mallard duck population?

<p>0.8 (B)</p> Signup and view all the answers

What is the frequency of the droopy allele in the swine population?

<p>0.08 (C)</p> Signup and view all the answers

What is the frequency of the yellow allele in the chicken population?

<p>0.09 (A)</p> Signup and view all the answers

What is the frequency of the Polled allele in the cattle population?

<p>0.40 (B)</p> Signup and view all the answers

What is the definition of broad sense heritability?

<p>VG / VP (C)</p> Signup and view all the answers

Which method of selection involves selecting animals based on the performance of their parents and grandparents?

<p>Pedigree selection (C)</p> Signup and view all the answers

What is the range of heritability values?

<p>0 to 1 (C)</p> Signup and view all the answers

What is the breeding value of an individual assessed on in progeny testing?

<p>The average performance of a random sample of its progeny (D)</p> Signup and view all the answers

Which method of selection involves selecting individuals based on a single measurement of their phenotype?

<p>Mass selection (B)</p> Signup and view all the answers

What is the implication of a high heritability value of 0.5?

<p>Half of the differences in phenotypes are genetic (C)</p> Signup and view all the answers

What is the factor that does not affect gene and genotypic frequency in a breeding population according to the Hardy-Weinberg Law?

<p>Vitrification (C)</p> Signup and view all the answers

Which sex is considered heterogametic in horses?

<p>Female (C)</p> Signup and view all the answers

What type of intra-allelic gene action is exhibited when a black coat (BB) color Angus cattle is crossed with a red coat (bb) color, resulting in a heterozygous black color (Bb) offspring?

<p>Incomplete dominance (D)</p> Signup and view all the answers

What is the primary goal of animal breeding?

<p>To improve the quantity of production of farm animals and their products (C)</p> Signup and view all the answers

What is the definition of selection in animal breeding?

<p>The process of choosing animals as parents of the next generation (C)</p> Signup and view all the answers

What determines the rate of genetic improvement and survival of any population?

<p>The physical and physiological processes of reproduction (B)</p> Signup and view all the answers

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