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Test your basic knowledge |
CSET Genetics
Start Test
Study First
Subjects
:
cset
,
science
,
genetics
Instructions:
Answer 33 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. In peas - flowers located along the stem (axial) are dominant to flowers located at the end of the stem (terminal). Let A represent the allele for axial flowers and a represent the allele for terminal flowers. When plants with axial flowers are cross
pure
segregation
example of dominant trait
AA x aa
2. States that genes for different traits can segregate independently during the formation of gametes and helps account for the many genetic variations observed in pants - animals - and other organisms
pure
One mouse can be homozygous dominant BB and one is heterozygous Bb or hybrid
independent assortment
segregation
3. How many pairs of chromosomes do humans have?
WW x ww
Heterozygous for that trait
23
homozygous
4. Threadlike structures made of DNA molecules that contain the genes.
One is homozygous dominant and the other is heterozygous
hetero
recessive
chromosomes
5. In cabbage butterflies - white color (W) is dominant and yellow color (w) is recessive. If a pure white cabbage butterfly mates with a yellow cabbage butterfly - all the resuting (F1) butterflies are heterozygous white. Which cross represents the gen
AA x aa
example of dominant trait
WW x ww
chromosomes
6. P is reccessive
P is dominant
phenotype
Bb
heterozygous
7. Man is Pp and woman is pp Pp x pp equals Pp - Pp - pp - pp 50% chance
Both parent horses are heterozygous for hair color
chances a child would be polydactly
independent assortment
hetero
8. Creates a blended phenotype; one allele is not completely dominant over the other
homozygous
Both parents carried at least one recessive gene for that trait
incomplete dominance
Bb
9. Term used to refer to an organism that has two different alleles for the same trait Bb
chromosomes
heterozygous
alleles
dominance
10. One capitol letter W
Heterozygous for that trait
to show dominant trait only need
WW x ww
example of dominant trait
11. For a given trait - the 2 genes of an allelic pair are not alike. An individual possessing this gene combination is said to be...
recessive
homo
23
Heterozygous for that trait
12. Different forms of a gene
Heterozygous for that trait
dominance
alleles
autosomes
13. Chromosomes that do not determine the sex of an individual
One mouse can be homozygous dominant BB and one is heterozygous Bb or hybrid
chromosomes
AA x aa
autosomes
14. Dominance B
homozygous
autosomes
Bb
when a strain of fruit flies homozygous for light body color is crossed with a strain of fruit flies homozygous for dark body color - all of the offspring have a light body color. This illustrates the principle of?
15. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. bb
recessive
heterozygous
AA x aa
One mouse can be homozygous dominant BB and one is heterozygous Bb or hybrid
16. Same BB
P is dominant
homo
recessive
incomplete dominance
17. Term used to refer to an organism that has two identical alleles for a particular trait BB
homozygous
Both parents carried at least one recessive gene for that trait
homo
One mouse can be homozygous dominant BB and one is heterozygous Bb or hybrid
18. 6 fingers F
phenotype
Polydactyly
example of dominant trait
homozygous
19. Kids heterozygous Ww
One is homozygous dominant and the other is heterozygous
independent assortment
Bb
WW x ww
20. A cross between 2 pea plants hybrid for a single trait produces 60 offspring. Approximatley how many of the offspring would be expected to exhibit the recessive trait?
recessive
Tt x Tt = TT - Tt - Tt - tt the tt is recessive 60 divide 4 is 15
25% black - 50% gray - 25% white
One is homozygous dominant and the other is heterozygous
21. Different Bb
25% black - 50% gray - 25% white
P is dominant
alleles
hetero
22. A characterstic in which a person has 6 fingers per hand. Polydactlyl is dominant over the trait for 5 fingers. If a man who is heterozygous for this trait marries a woman withthe normal number of finger
homo
when a strain of fruit flies homozygous for light body color is crossed with a strain of fruit flies homozygous for dark body color - all of the offspring have a light body color. This illustrates the principle of?
Polydactyly
WW x ww
23. If a breeder wanted to discover whether a black guinea pig was homozygous (BB) or heterozygous (Bb) for a coat color - the animal in question would be crossed with an individual of what genotype?
Bb
Polydactyly
homo
Both parents carried at least one recessive gene for that trait
24. (genetics) the separation of paired alleles during meiosis so that members of each pair of alleles appear in different gametes
segregation
chances a child would be polydactly
incomplete dominance
One mouse can be homozygous dominant BB and one is heterozygous Bb or hybrid
25. In horses - black color is dominant over chestnut color. 2 black horses produce both black and a chestnut colored offspring. If coat color is controlled by a single pair of genes - it can best be assumed that...
Both parent horses are heterozygous for hair color
to show dominant trait only need
recessive
25% black - 50% gray - 25% white
26. An organism's physical appearance - or visible traits
WW x ww
phenotype
chromosomes
Both parents carried at least one recessive gene for that trait
27. Having two like genes
incomplete dominance
autosomes
example of dominant trait
pure
28. An organism with a dominant allele for a particular form of a trait will always exhibit that form of the trait. (ex. Bb --- The big B would be dominant B
homozygous
Heterozygous for that trait
dominance
Bb
29. When a mouse with black fur is crossed with a mouse with white fur - all f1 generation offspring have gray fur. Which phenotypic results can be expected in the F2 generation.
23
25% black - 50% gray - 25% white
example of dominant trait
recessive
30. The appearnce of a recessive trait in offspring of animals most probably indicates that...
incomplete dominance
Both parents carried at least one recessive gene for that trait
One mouse can be homozygous dominant BB and one is heterozygous Bb or hybrid
to show dominant trait only need
31. Explain how organisms can have the same phenotypes and different genotypes.
AA x aa
chances a child would be polydactly
alleles
One mouse can be homozygous dominant BB and one is heterozygous Bb or hybrid
32. 2 organisms may show the same trait - yet have different genotypes for that phenotype
homozygous
hetero
chances a child would be polydactly
One is homozygous dominant and the other is heterozygous
33. In guinea pigs - black coat color is dominant over white coat color. The offspring of a mating between 2 heterozygous black guinea pigs would probably show a genotype ratio of...
Both parent horses are heterozygous for hair color
AA x aa
1 BB: 2 Bb: 1 bb 2 heterozygous Bb x Bb
independent assortment