Which of the following is an example of discontinuous variation?
B. blood type
D. Hand span
What are the organs of the excretory system?
A. brain and nerves
B. heart and blood
C. bladder and kidneys
D. muscles and bones
The basic unit of heredity that consists of a segment of DNA on a chromosome
B. double helix
Which body system circulates waste, nutrients, and gases all over the body?
The passing of genetic traits from parent to offspring is called
A chart used to show all the ways genes from two parents can combine and be passed to offspring is a
A. Pie chart
B. Line graph
C. Bar graph
D. Punnett Square
Traits that are displayed only when two of the traits are present.
What is one internal environmental condition that can influence a person’s height?
A term that describes an allele that is not expressed when combined with a dominant form of the allele
To ensure scientific results are valid, what should you do during an experiment?
A. Conduct multiple trials.
B. Change hypothesis to fit result.
C. Have more then one independent variable.
D. Ignore results.
What are the levels of organization in the human body from smallest to largest?
A. tissues, cells, systems, organs
B. organs, tissues, cells, systems
C. organ systems, organs, tissues, cells
D. cells, tissues, organs, organ systems
Which system removes waste from the body?
Both genes show in the phenotype
A. incomplete dominance
B. complete dominance
D. unrelated dominance
Which two systems work together to get oxygen to the cells?
A. digestive and circulatory
B. nervous and circulatory
C. circulatory and respiratory
D. nervous and respiratory
How can two parents with brown eyes have a child with blue eyes?
A. The parents may both have a recessive gene for blue eyes.
B. The child was born during the winter
C. Eye color in humans is not an inherited trait
D. The child was deprived of oxygen during its birth
A trait that is covered over by another form of that trait.
A. Recessive Trait
B. Dominant Trait
In peas, seed pods can be green (G) or yellow (g). The Punnett square shows a cross between a plant with green seed pods and a plant with yellow seed pods.
What will happen if two of the offspring plants are crossed?
A. All the plants will have green seed pods.
B. All the plants will have yellow seed pods.
C. 75% of the plants will have green seed pods, and 25% of the plants will have yellow seed pods.
D. 50% of the plants will have green seed pods, and 50% of the plants will have yellow seed pods.
Organisms that have inherited two different forms of the same trait, one from each parent
C. dominant trait
D. recessive trait
Short tails (T) are dominant to long tails (t). What is the probability of a long-tailed mouse in the cross Ttxtt?
When parents with different traits are bred, a trait that reappears in the second generation after disappearing in the first generation is a
A. dominant trait
B. true-breeding trait
C. recessive trait
Traits that are always displayed no matter what the other allele is
How can the genotype “ee” be expressed?
A. Homozygous Dominant
B. Homozygous Recessive
C. Heterozygous Dominant
D. Heterozygous Recessive
What describes the goal of genetically engineering crops?
A. to make the product more expensive to purchase
B. to reduce the amount of genetic diversity
C. to develop new pathogens for humans
D. to increase yield and profit
True or False: Mendel used pea plants because they grow quickly and have distinctly different colored flowers.
Represents an organisms inherited traits- Usually written as two letters
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