Epistasis - Study guides, Class notes & Summaries

Chapter 03 Extensions to Mendel’s Laws     
Multiple Choice Questions
  1.  Which of the following is not a phenotypic description of allele interactions affecting the expression of traits?  
A.  incomplete dominance 
B.  codominance 
C.  polymorphic 
D.  multifactorial 
E.  pleiotrophic   
Bloom's: 1. Remember
Learning Objective: 03.01.01 Categorize allele interactions as completely dominant, incompletely dominant, or codominant.
Section: 03.01
Topic...

ANSC 1401 Crossland Exam 3 Questions and Answers Already Passed DNA is located in the chromosome of the nucleus of the cell. True Gene Small section of DNA that codes for a specific purpose. Genome Sum of genetic material of an animal. Trait Observable characteristics Allele you receive one of these from each parent which can make a gene have various forms of genotypes and phenotypes. Mitosis somatic cell division Meiosis Development of germ cells, aka gametogenesis C...

AQA BIOLOGY ESSAYS - PAST PAPER EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRADEA+ The importance of movement in biological molecules and cells Correct Answer: Synaptic transmission Nerve Impulse Glucose control/ Homeostasis Transcription, Translation Regulation of transcription and translation Translocation, Movement of blood Photosynthesis Respiration Cell division- Mitosis, Meiosis Immunity How DNA is used by living organisms and it's importa...

Loss of function Mutations Cause a gene to lose some or all of it's normal function Hypomorphic mutations Genes that have lost only some of their function Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:03 / 0:15 Full screen Brainpower Read More Null mutations Genes that have lost all of their function Haplo-sufficient One (haplo) copy is sufficient to produce the wild-type phenotype in the heterozygous genotype Fully dominant ...

Biology 102 Exam 2 WSU Carloye Latest Update 100% Solved Heterozygous When two different alleles combine to form a trait. Example: A tall person and a short person have a child who is short. The short allele is dominant so the child grew up to be short. Gene A section of DNA that controls a certain trait. Example: Eye color. Dominant Determines the expression of a trait (visually). Example: Brown eyes, dark hair. Homozygous A homozygous trait is when two of the same kind of all...

Incomplete penetrance Penetrant organisms have the genotype and express the phenotype. Non penetrant organisms have the genotype but don't express the phenotype. (penetrant)/(total penetrant+ non penetrant) No gene interaction 9:3:3:1 9/16 A_B_ 3/16 A_bb 3/16 aaB_ 1/16 aabb Complementary gene interaction 9:7 9/16 A_B_ 7/16 A_bb or aaB_ or aabb Duplicate gene interaction 15:1 15/16 A_B_ or A_bb or aaB_ 1/16 aabb Dominate gene interaction 9:6:1 9/16 A_B_ 6/16 A_bb or aaB_ 1/16 aabb Dominate ...

Ecology Exam 2 Chapter 7 1. Different forms of a particular gene are known as a. chromosomes. b. alleles. c. polygenic. d. pleiotropic. Answer: b 2. A trait that is determined by multiple genes is referred to as a. polygenic. b. pleiotropic. c. homozygous. d. heterozygous. Answer: a 3.Chickens with the dominant allele at the frizzle gene produce curly feathers, have very high body temperature, and lay few eggs. This is an example of a. polygenic traits. b. pleiotropy. c. epista...

name three factors affecting independence (and F2 ratios) Ans: -pleiotropy -epistasis -linkage What is pleiotropy? Ans: When 1 gene (locus) has more than 1 effect on an individuals phenotype (eg. W allele in cats causes both white fur and deafness) What is epistasis? Ans: a gene at one locus alters the phenotypic expression of a gene at a second locus (eg. W allele masks all other colour or pattern genes in cat coat when present) P Ans: frequency of the homo dominant (AA) genotype ...

Ecology Exam 2 Chapter 7 1. Different forms of a particular gene are known as a. chromosomes. b. alleles. c. polygenic. d. pleiotropic. Answer: b 2. A trait that is determined by multiple genes is referred to as a. polygenic. b. pleiotropic. c. homozygous. d. heterozygous. Answer: a 3.Chickens with the dominant allele at the frizzle gene produce curly feathers, have very high body temperature, and lay few eggs. This is an example of a. polygenic traits. b. pleiotropy. c. epista...

BIOL110 Exam 3 Mastering Bio Questions (answered) A gene that affects the expression of a second gene is an example of __________________. A. pleiotropy B. codominance C. epistasis D. polygenic inheritance E. incomplete dominance C. epistasis __________ is an example of a character that is controlled by more than one gene (a quantitative character) and demonstrates a continuum of phenotypes. A. Pleiotropy B. Polygenic inheritance C. Epistasis D. Codominance E. Incomplete dominan...