What is epistasis Study guides, Class notes & Summaries

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...

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 ...

What are deleterious genes and list one example - Answer- alleles whose phenotype results in significantly reduced fitness of an animal; Dexter cattle - short legs Genetics - Answer- The scientific study of heredity and hereditary variation. Gregor Mendel is often referred to as - Answer- "Father of Genetics" What plant did Gregor Mendel study? - Answer- peas Why was Mendel more successful than other researchers? (what were they looking for or at differently) - Answer- 1. Picked ea...

Primavera Biology B Unit 1: Genetics Questions and Answers 100% Pass CHECKPOINT 01 Some people have dimples; other people do not. Having dimples is dominant over not having dimples. If the allele for having dimples is represented with the letter D, what allele combinations can result in having dimples? DD, Dd Which statement is true about model organisms? They help scientists understand biological processes. A pea plant that is tall has a dominant trait. Which statements are true about the...

Genetics Exam #2 With Questions and Answers 100% Solved What is the molecular mechanism for imprinting a gene? a. acetylation b. methylation c. phosphorylation d. mutation e. nitration - answerB Genomic imprinting most commonly uses____ to ____genes. Select one: a. acetylation : activate b. methylation : activate c. phosphorylation : activate d. methylation : deactivate e. phosphorylation : deactivate - answerD Individuals with three copies of most autosomes do not survive. Indivi...

HESI A2 BIOLOGY QUESTIONS AND ANSWERS Hierarchic Organizational system for nomenclature Kingdom Phylum Class Order Family Genus Species (Least) "Keep Penguins Cool Or Find Good Shelter" Scientific Method Observation Hypothesis Experiment Conclusion Water All life, and therefore biology , occurs in water. Properties of Water 2 Hydrogen bonds Covalently bonded to Oxygen. Hydrogen Bonding between molecules. - High specific heat - Large bodies or water stabilize...

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 alleles combine to form a trait. Example: When two tall...

The DNA coding for a particular protein consists of 600 base pairs. How many amino acids are in the protein encoded by this gene? - Answer- 200 amino acids The process shown in the diagram is oogenesis in giraffes. Egg cells of giraffes have 15 chromosomes. How many chromosomes and chromatids would be found in the cell indicated with an arrow? - Answer- 15 chromosomes, 30 chromatids The DNA of a cell is replicated during what phase of the mitotic cell cycle? - Answer- S The genome of th...

Genetics Final Exam (Final exam for Pittcock Genetics) Questions and Correct Answers (Verified by Expert). What are deleterious genes and list one example alleles whose phenotype results in significantly reduced fitness of an animal; Dexter cattle - short legs Genetics The scientific study of heredity and hereditary variation. Gregor Mendel is often referred to as "Father of Genetics" What plant did Gregor Mendel study? peas Why was Mendel more successful than other researchers? (wha...

When do F2 ratios do not hold? Ans: When 2 loci are not independent What is pleiotropy? Ans: One locus affects more than one trait What is epistasis? Ans: Allele at one ocus that affects the allele on another locus What is linkage Ans: 2 or more loci on the same chromosome What impairment is linked with white fur in cats and what is it caused by Ans: Deafness and melanocytes 2 What do P,H,Q stand for in the equation+H+Q=1? Ans: P=homozygous dominant, H=heterozygous, Q=homozygous Wha...