PSYC 4541 MC

Choose the incorrect statement.

The Flynn effect refers to a significant decrease in IQ in the 20th century.

How many alleles does each parent transmit to an offspring?

one

The combination of alleles at a particular locus is

genotype

An alternative form of a gene at a locus is

allele

Which of these is a heterozygous genotype?

Ss

Two copies of an allele needs to be present to produce the phenotype

recessive

New phenotypic combinations not seen in the true-breeding parental lines are

recombinant types

The frequency of individuals with a recessive disease is

q2

The frequency of carriers of a recessive disease is

2pq

What phenotype (coat color) will we see for the Labs with the following genotypes?
BBEE
bbee
BbEe
bbEE
Bbee

black, yellow, black, brown, yellow

Human blood type is an example of

Codominance

Retina blastoma is an example of

Variable expressivity

Phocomelia is an example illustrating

Phenocopy

Which of these disorders is due to nondisjunction?

Down syndrome
Turner syndrome
Klinefelter syndrome
All of the above

Which of these disorders is due to an expanded triplet repeat?

Fragile X syndrome

Huntington’s disease is due to

Expanded triplet repeat

This figure indicates that the correct model for gene A, with alleles A1 and A2, is

additive

Which of these is not a complex trait?

Huntington’s disease

DNA is comprised of

Nucleotides

Conversion of genetic code to polypeptide chains occurs during

Translation

A codon

Is made up of three bases
Attracts tRNA
Specifies an amino acid
All of the above

_____ allows one gene to code for several different proteins

Alternative splicing

Which of these is comprised of amino acids?

protein

How many pairs of chromosomes do humans have?

23

Which of these disorders is an example of genomic imprinting?

Angelman syndrome

Prader-Willi syndrome

Turner syndrome

All of the above

The environment, such as maternal diet, can influence phenotypes via

DNA methylation

Mosaicism is the result of

X inactivation

Researchers selectively bred mice that are very fearful and mice that are not fearful at all for 30 generations, and the fearfulness scores of the two lines of mice didn’t differ significantly in the end. This provides evidence of

Genetic influences

Gene x environment interaction

Neither

Researchers selectively bred mice that are very fearful and mice that are not fearful at all for 30 generations. The two lines of mice had very different scores within two generations. This provides evidence of

A few genes influencing fearfulness

C57BL/6 mice and the BALB/c mice differed significantly in sensitivity to alcohol, but there were also differences within C57BL/6 and BALB/c mice. This result suggests there are

Genetic influences on alcohol

There were no differences among the C57BL/6 mice in sensitivity to alcohol. What does this result tell us?

No environmental influences

The F1 generation resulting from the cross between BALB/c mothers and C57BL/6 fathers was much more active than the F1 generation resulting from the cross between C57BL/6 mothers and BALB/c fathers. What does this result tell us?

Significant mothering effect

One set of C57/BL6 mice and BALB/c mice were sent to University of Florida, and another set to University of Colorado. The two strains did not differ in their activity level in Florida, but they differed significantly in their activity level in Colorado. This is evidence of:

Gene x environment interaction

Which of these is not a methodological issue in an adoption study?

Equal environments assumption

Which of these is not a methodological issue in a twin study?

Selective placement

Environmental influences are not a source of resemblance for

DZ twin pairs reared apart

Genetic influences are not a source of resemblance for

Adoptive siblings

Which of the following includes measurement error?

e2

Which of the following cannot be estimated simultaneously in the classic twin design?

c2 and d2

Which of these cannot be estimated using extended twin family designs?

epistatistic variance

Which of the following are consistent with a sibling competition/contrast effect

Greater MZ than DZ variance

Which of the following is consistent with evidence of covariance between nonshared environmental influences on two traits?

rMZ < phenotypic correlation

Which of the following models examines a composite latent factor?

Common pathway

What of the following statements re: the human genome project is incorrect?

Two humans share 50% of DNA

Bar Graph: The figure below suggests the following re: general cognitive ability

genetic and environmental influences

If r adoptive siblings = .30, h2 is:

there isn’t sufficient information to calculate heritability

Calculate c2 if: r adoptive siblings = .30

.30

A twin stufy found the following correlations for reading disability. The results suggest:

different genes or shared environmental influences in males and females