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- 1. Multiple Choice
What is the purpose of DNA?
manufactures proteins
reduces activation energy
stores hereditary information
to aid in facilitated diffusion
- 2. Multiple Choice
According to the Punnett square: B represents the dominant gene for blue feathers and b represents the recessive gene for red feathers. Two heterozygous birds have one offspring. What percent chance does it have for red feathers?
0%
25%
75%
100%
- 3. Multiple Choice
In rabbits, the allele for black fur, B, is dominant over the allele for brown fur, b.
Calculate the probability of a homozygous dominant (BB) offspring resulting from a cross between two parents with the genotype Bb
- 4. Multiple Choice
An organism with 32 chromosomes in each body cell will produce sex cells with __________ chromosomes.
18
32
64
12
- 5. Multiple Choice
DNA fingerprinting would most likely be used to:
identify human age and lifespan
determine genetic relationships
diagnose different types of cancer
create genetically-identical species
- 6. Multiple Choice
The Punnett square shown presents a cross between two piranha. Both parents have large teeth.
According to the chart, which combination describes the offspring expected from the cross?
50% large-toothed and 50% small-toothed
75% small-toothed and 25% large-toothed
75% large-toothed and 25% small-toothed
100% large-toothed
- 7. Multiple Choice
What situation is an example of artificial selection?
Female bluegill fish prefer to lay their eggs in the nests of larger male fish.
Albino deer or rabbits have a low survival rate in nature, because it is easy for predators to spot them.
Penguins with higher body fat tend to survive nesting in the Antarctic winter, while leaner penguins often die.
More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory.
- 8. Multiple Choice
In piranha, fish with large teeth represent the dominant trait. Because the dominant trait masks the recessive trait, in a population of 1,000 piranhas, all with large teeth, we could expect about ________of the next generation of fish to have small teeth.
0%
25%
50%
75%
- 9. Multiple Choice
The process of ____________ increases genetic variability as it produces gametes for sexual reproduction.
conjugation
mitosis
meiosis
replication
- 10. Multiple Choice
In some instances, humans breed animals that are close relatives to produce desired traits. This is called
cloning
random mating
artificial selection
inbreeding
- 11. Multiple Choice
Cattle species A have good resistance to high temperature, but its meat is poor. Cattle species B has good meat, but poor resistance to high temperatures. Scientists formed the a new species of cattle by breeding A with B .This new type of cattle has good meat and resistance to high temperatures. This is an example of
inbreeding
natural selection
selective breeding
genetic engineering
- 12. Multiple Choice
Which crisis can be improved by selective breeding?
famine
pollution
global warming
overpopulation
- 13. Multiple Choice
Which is an ADVANTAGE of sexual reproduction?
Two parents are required.
Only one parent is required.
It leads to genetically diverse offspring.
It leads to genetically identical offspring.
- 14. Multiple Choice
Things like your eye color and height are not traits you can control. In fact, you inherit traits like these from your parents. These traits are passed on because they are controlled by ____________.
LNA
genes
hormones
tradition
- 15. Multiple Choice
Things like your eye color and height are not under your control. This is because they are determined by your genes.
So, eye color is a good example of an inherited __________.
estate
gene
height
trait
- 16. Multiple Choice
Consider the possible genotypes of the offspring of two heterozygous brown goats. The ratio of brown to white offspring in this case would be
1:3
2:2
3:1
3:4
- 17. Multiple Choice
Which describes a trait from a recessive gene?
It causes a mutation.
It masks a dominant gene trait.
It can appear if it is heterozygous.
It usually appears only if it is homozygous.
- 18. Multiple Choice
A human skin cell contains 46 chromosomes. How many chromosomes are present in a human egg cell?
23
46
92
138
- 19. Multiple Choice
What is one distinct DISADVANTAGE of sexual reproduction?
Organisms that sexually reproduce do not produce much genetic variety.
Sexual reproduction, unlike asexual reproduction, can rapidly produce too many new offspring.
Sexual reproduction requires two individuals, which may be difficult for endangered or uncommon species of organisms.
Sexual reproduction produces offspring that are all equally vulnerable to the same diseases, predators, and other environmental pressures.
- 20. Multiple Choice
What technique enables scientists to determine match DNA to an unknown person.
cloning
transformation
DNA fingerprinting
reverse transcription
- 21. Multiple Choice
The nucleus contains the cells genetic material in the form of
ADP
ATP
DNA
RNA
- 22. Multiple Choice
Gregor Mendel is best known for his work with pea plants and for helping uncover many of the mysteries of genetics. One of his major findings stated that there were specific, physical units of inheritance that are transmitted during reproduction. What is the the name given to these units of inheritance which can be found on chromosomes?
centromeres
cytoplasm
genes
nucleotides
- 23. Multiple Choice
In rabbits, B represents the allele for black coat and b represents the allele for white coat. Black is dominant over white. If a rabbit has the genotype Bb, what is the rabbit's phenotype?
gray
black
white
BB x bb
- 24. Multiple Choice
Selective breeding is the process of breeding plants or animals so that they inherit particular traits from their parents. Which of these is not possible with selectively breeding a crop species?
The crop becomes more tolerant to drought.
The quality and yield of the crop improves.
The crop becomes resistant to bacteria and fungi.
The offspring will have all different traits from the parents.
- 25. Multiple Choice
The passing of traits from parent to offspring
Genetics
Mendel
Heredity
Recessive
- 26. Multiple Choice
Instructions for an inherited trait
Allele
Genetics
Gene
Trait
- 27. Multiple Choice
Characteristic of an organism that makes it unique
Genetics
DNA
Allele
Heredity
- 28. Multiple Choice
when the offspring inherits two identical recessive alleles
black fur
dominant
homozygous dominant
homozygous recessive
- 29. Multiple Choice
the allele that is always masked in the presence of the stronger
dominant
recessive
heterozygous
homozygous
- 30. Multiple Choice
Characteristic of an organism that makes it unique
Trait
Heredity
Genetics
Allele
- 31. Multiple Choice
Chart used to organize all possible combinations of offspring
Homozygous
Heterozygous
Dominant
Punnett Square
- 32. Multiple Choice
Combination of letters that represents an organisms genetic makeup
Genotype
Phenotype
Homozygous
Heterozygous
- 33. Multiple Choice
When the offspring inherits two identical dominant alleles
Homozygous
Heterozygous
Genotype
Phenotype
- 34. Multiple Choice
When the offspring inherits two different alleles
Homozygous
Heterozygous
Genotype
Phenotype
- 35. Multiple Choice
Organisms outward appearance
Genotype
Phenotype
Homozygous
Heterozygous
- 36. Multiple Choice
the allele that always shows up & hides the weaker allele
dominant
recessive
heterozygous
homozygous
- 37. Multiple Choice
In the genotype, the capital letter stands for the ____________________ allele.
recessive
dominant
heterozygous
homozygous
- 38. Multiple Choice
___________________ is the godfather of genetics.
Waltz
Abner
Hood
Mendel
- 39. Multiple Choice
When you cross two heterozygous organisms what is the probability that the offspring will show the dominant phenotype?
0%
25%
50%
75%
100%
- 40. Multiple Choice
When is your unit exam?
MONDAY
FRIDAY
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