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Stutts - ANSC 4395 Animal Breeding & Genetics - Test 2 QUESTIONS WITH COMPLETE ANSWERS
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  • ANSC 4395
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  • Western Governors University

Gregor Mendel Correct Answer: Father of Genetics mid 19th century performed breeding experiment with peas Gene Correct Answer: Basic unit of inheritance Segments of DNA Short segments of chromosomes Chromosomes Correct Answer: Long strands of DNA and associated proteins present in the ...

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  • October 19, 2022
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  • 2022/2023
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  • stutts ansc 4395 animal breeding amp genetics test 2 questions with complete answers

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Stutts - ANSC 4395 Animal Breeding & Genetics - Test 2
QUESTIONS WITH COMPLETE ANSWERS

Gregor Mendel Correct Answer: Father of Genetics
mid 19th century
performed breeding experiment with peas

Gene Correct Answer: Basic unit of inheritance
Segments of DNA
Short segments of chromosomes

Chromosomes Correct Answer: Long strands of DNA and associated proteins present in the
nucleus of every cell
Present in pairs

Homologs Correct Answer: Pair of chromosomes having corresponding loci

Locus Correct Answer: The specific location of a gene on a chromosome

Allele Correct Answer: an alternative form of a gene

Dominance of alleles Correct Answer: how one allele reacts to another allele

Multiple alleles Correct Answer: more than two possible alleles at a locus
A a a' a''

Genotype Correct Answer: The combination of genes at a particular locus

Homozygous Correct Answer: a one-locus genotype containing functionally identical genes
ex:BB, bb

Heterozygous Correct Answer: a one-locus genotype containing functionally different genes ex:
Gg, Bb

Law of Segregation Correct Answer: Mendel's 1st law
In the formation of a germ cell or gamete, the two genes at a locus in the parent cell are
separated, only one gene being incorporated into each germ cell.
-Meiosis
-Entire homologous chromosomes seperated

Germ Cells Correct Answer: contain half the number of chromosomes and half the number of
genes as normal body cells

Law of Independent Assortment Correct Answer: Mendel's 2nd law

, Genes assort independently during meiosis if all possible gametes are formed in equal
proportions

Linkage Correct Answer: The occurrence of two or more loci of interest on the same
chromosomes

Crossing over Correct Answer: a reciprocal exchange of chromosome segments between
homologs
prior to the time chromosomes are separated to form gametes

Recombination Correct Answer: the formation of a new combination of genes on a chromosome
as a result of crossing over

Gamete Selection Correct Answer: the process that determines which egg matures and which
sperm succeeds in fertilizing the egg

Punnett Square Correct Answer: commonly used device for determining the possible zygotes
obtainable from the mating of any two parental genotypes

GG Correct Answer: homozygous dominant

Gg Correct Answer: heterozygous (dominant)

gg Correct Answer: homozygous recessive

Mendelian Sampling Correct Answer: The random sampling of parental genes caused by
segregation and independent assortment of genes during germ cell formation and by random
selection of gametes in the formation of the embryo

Dominance Correct Answer: An interaction between genes at a single locus such that in
heterozygous one allele has more effect

Simple Inherited Traits Correct Answer: explains why we got various phenotypes in specific
proportions when we make specific matings

polygenic inheritance Correct Answer: chief source of hybrid vigor and inbreeding depression

Complete Dominance Correct Answer: A form of dominance in which the expression of the
heterozygote is identical to the expression of the homozygous dominant gene type
-Ex: polled train in cattle, color in Angus cattle
-P= polled, PP=polled, Pp=polled, pp=horned

Co-dominance Correct Answer: A form of dominance in which the expression of the
heterozygote is exactly midway between the expressions of the homozygous genotypes
-Ex: breed red(RR) shorthorn with white(rr) shorthorn: you get a roan (Rr) from having both

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