ANSC 1401 CROSSLAND FINAL EXAMACTUAL

ANSC 1401 CROSSLAND FINAL EXAM(ACTUAL

QUESTIONS AND VERIFIED ANSWERS LATEST ALREADY

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Mitosis - ---Answers---somatic cell division

Meiosis - ---Answers---Development of germ cells, aka gametogenesis

Codominance - ---Answers---when different alleles are expressed in a phenotype at the same time

Incomplete dominance - ---Answers---when no dominant allele in expressed in a phenotype, rather an intermediate expression is observed.

Mutation - ---Answers---chemical composition changes of a gene which alter DNA

Selection - ---Answers---allowing some animals to reproduce more than other animals

An animal with matching alleles at a given loci is homozygous

• ---Answers---True

An animal with different alleles at a given loci is heterozygous.

• ---Answers---True 1 / 4

Dominant alleles are expressed over recessive alleles. - --- Answers---True

An animal with a heterozygous genotype at a given loci with express the recessive allele in the phenotype - ---Answers--- False

Epistasis is the interaction among genes at a different loci - -- -Answers---True

Assuming normal dominance of the E and A loci where

heterozygosity results in the dominant phenotype:

Black horse: EE

Red horse: ee

AA: black points

aa: no points

What is the genotype - ---Answers---EEAA, EEAa, EeAA EeAa, EEaa, Eeaa

You've just bough a new Angus bull. You want to know if he's homozygous dominant for the black genotype. How would you do a testcross with some heifers to determine this. - --- Answers---Mate to homozygous recessive females.

Testcrossing to determine lethal gene carriers are ideal and inexpensive. - ---Answers---False 2 / 4

Genes located on either the X or Y chromosome are known as sex-linked traits. - ---Answers---True

What is the phenotypic frequency of the blue pigs?

• pigs are blue out of 10 - ---Answers---.3

What is the genotypic frequency of the recessive gene?11 out of the R's are small - ---Answers---.55

Inbreeding - ---Answers---mating closely related individuals to increase homozygosity

Linebreeding - ---Answers---form of inbreeding in which the purpose is to concentrate genes of an outstanding ancestor in a herd/population

Outbreeding - ---Answers---mating less closely individuals when compared to the average populations

Crossbreeding - ---Answers---mating animals of diverse genetic backgrounds or different breeds

Genetic correlation - ---Answers---when many of the same genes control two separate traits

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Contemporary Group - ---Answers---group of animals od a given age and sex, having similar management and given an equal opportunity to perform

Calving ease and yearling weight are positively correlated - -- -Answers---false

Weaning weight and yearling weight are positively correlated - ---Answers---True

Which of the following traits would you have the most difficulty in selecting for performance improvement? - ---Answers--- Calving interval

Which bull would you expect to sire the heaving calves at weaning? - ---Answers---Three Trees Xceptional B0048

What is the expected difference in weaning weight of the offspring between GAR100x & Three Trees Xceptional B0048? - ---Answers---24

Match the animal with the type of AI technique Cattle, Sheep & Goats, Swine & Dogs, Horse Vaginocervical, Laproscopic, Transcervical, Rectocervical - --- Answers---Cattle - Rectocervical Sheep & Goats - Laproscopic Swine & Dogs - Transcervical

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