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Biology: Science for Life

Colleen M. Belk, Virginia M. Borden, Colleen Belk, Virginia Borden

Chapter 4

Are You Only As Smart As Your Genes? - all with Video Answers

Educators

Chapter Questions

01:45

Problem 1

Describe the relationship between a gene, a protein, and a trait.

Bryan Lynn
Bryan Lynn
Numerade Educator
03:47

Problem 2

Why are nonidentical-twin children produced by the same set of parents different from each other?

John Barone
John Barone
Numerade Educator
00:50

Problem 3

What factors cause quantitative variation in a trait within a population?

Derrick Danso
Derrick Danso
Numerade Educator
00:18

Problem 4

What is heritability?

Joanna Quigley
Joanna Quigley
Numerade Educator
01:03

Problem 5

Can we predict the phenotypes of offspring from the phenotype of their parents? If yes, how? If no, why not?

Khalida Dawar
Khalida Dawar
Numerade Educator
03:48

Problem 6

A gene $\qquad$
a. contains information about how to make a protein
b. may come in different "versions"
c. is expressed in every cell in the body
d. a and b are correct
e. a, b, and c are correct

Danielle Ashley
Danielle Ashley
Numerade Educator
00:33

Problem 7

An allele is a $\qquad$ .
a. version of a gene
b. dysfunctional gene
c. protein
d. spare copy of a gene
e. phenotype

Khalida Dawar
Khalida Dawar
Numerade Educator
01:09

Problem 8

Sperm or eggs in humans always $\qquad$ -
a. each have two copies of every gene
b. each have one copy of every gene
c. each contain either all recessive alleles or all dominant alleles
d. are genetically identical to all other sperm or eggs produced by that person
e. each contain all of the genetic information from their producer

Derrick Danso
Derrick Danso
Numerade Educator
02:32

Problem 9

The physical appearance of an individual is $\qquad$ .
a. the result of both genotype and environment
b. its phenotype
c. completely determined by the genes they carry
d. a and b are correct
e. a, b, and c are correct

Matthew Halloran
Matthew Halloran
Numerade Educator
01:30

Problem 10

A mistake or "misspelling" that occurs during the copying of gene and results in a change in gene is called a(n) $\qquad$ -
a. dominant allele
b. mutation
c. mistakes never occur in gene copying
d. dysfunction
e. improvement

SH
Sara Hendrix
Numerade Educator
01:28

Problem 11

Which of the following genotypes is heterozygous?
a. $A A$
b. $A a$
c. $a$
d. $A A B B$
e. More than one of the above.

Jessica Honkomp
Jessica Honkomp
Numerade Educator
03:51

Problem 12

When the effects of an allele are seen only when an individual carries two copies of the allele, the allele is termed $\qquad$
a. dominant
b. incompletely dominant
c. recessive
d. codominant
e. genotypic

Eric Goldman
Eric Goldman
Numerade Educator
01:04

Problem 13

A quantitative trait $\qquad$ .
a. may be one that is strongly influenced by the environment
b. varies continuously in a population
c. may be influenced by many genes
d. has more than a few values in a population
e. All of the above are correct.

Derrick Danso
Derrick Danso
Numerade Educator
02:09

Problem 14

All of the following traits are quantitative in human populations except $\qquad$
a. sickle-cell anemia
b. height
c. skin color
d. IQ
e. susceptibility to cancer

Evey Z
Evey Z
Numerade Educator
01:06

Problem 15

When a trait is highly heritable $\qquad$ .
a. it is influenced by genes
b. it is not influenced by the environment
c. the variance of the trait in a population can be explained primarily by variance in their genotypes
d. a and c are correct
e. a, b, and c are correct

Derrick Danso
Derrick Danso
Numerade Educator