ANSC 4395 EXAM 3 QUESTIONS & ANSWERS
1. what is a simply inherited trait Answers - trait attected by one or only a few genes
2. what is a polygenic trait Answers - trait controlled by two or more genes
3. polygenic traits are described as... Answers - numbers
4. polygenic traits are greatly influenced by..... Answers - environment
-Lack of feed
-Heat/cold stress
-Training of quarter horses (speed)
5. the more genes involved the it is to determine their effects Answers
- harder
6. what are test matings Answers - mating designed to reveal the genotype of an individual for a small
number of loci (designed to reveal the genotype of a simply inherited trait)
7. what are the three types of test matings? Answers - mating
to recessive mating to heterozygous
mating a sire to daugthers
8. the probability of a heterozygous male having normal offspring....... Answers -
diminishes rapidly as the number of mating increases
9. statistics Answers - estimate of a paramater
10. paramater Answers - a value that describes a population
11. population Answers - all the members of a group
12. sample Answers - subject of a popualtion
13. discrete variables Answers - have distinct values
14. continuous variables Answers - for any two values; there is a possible intermediate value
15. measure of central tendency Answers - mean/average
16. what are the two basic types of statistics Answers - measure of central tendency and
1/5
, measure of variability
17. what is median Answers - number in the middle
18. what is mode Answers - most frequent value
19. what is standard deviation Answers - a measure of how widely distributed the observations are
around the mean
20. what is variance Answers - the square of the standard deviation
21. what is the coefficient of variation Answers - the standard deviation as a percentage of the mean
22. what percent of the observations are within 1 SD of the mean Answers - 68%
23. what percent of the observations are within 2 SD of the mean Answers - 95%
2/5
1. what is a simply inherited trait Answers - trait attected by one or only a few genes
2. what is a polygenic trait Answers - trait controlled by two or more genes
3. polygenic traits are described as... Answers - numbers
4. polygenic traits are greatly influenced by..... Answers - environment
-Lack of feed
-Heat/cold stress
-Training of quarter horses (speed)
5. the more genes involved the it is to determine their effects Answers
- harder
6. what are test matings Answers - mating designed to reveal the genotype of an individual for a small
number of loci (designed to reveal the genotype of a simply inherited trait)
7. what are the three types of test matings? Answers - mating
to recessive mating to heterozygous
mating a sire to daugthers
8. the probability of a heterozygous male having normal offspring....... Answers -
diminishes rapidly as the number of mating increases
9. statistics Answers - estimate of a paramater
10. paramater Answers - a value that describes a population
11. population Answers - all the members of a group
12. sample Answers - subject of a popualtion
13. discrete variables Answers - have distinct values
14. continuous variables Answers - for any two values; there is a possible intermediate value
15. measure of central tendency Answers - mean/average
16. what are the two basic types of statistics Answers - measure of central tendency and
1/5
, measure of variability
17. what is median Answers - number in the middle
18. what is mode Answers - most frequent value
19. what is standard deviation Answers - a measure of how widely distributed the observations are
around the mean
20. what is variance Answers - the square of the standard deviation
21. what is the coefficient of variation Answers - the standard deviation as a percentage of the mean
22. what percent of the observations are within 1 SD of the mean Answers - 68%
23. what percent of the observations are within 2 SD of the mean Answers - 95%
2/5
