bio ch16-17

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1

The concept that offspring can inherit the acquired skills of their parents is called

blending inheritance or Lamarck's hypothesis.

2

What personal characteristics and events in Gregor Mendel's life significantly contributed to his ultimate contribution to the study of inheritance?

His training in physics and mathematics at the University of Vienna.

3

Mating a purebred Labrador retriever to a purebred poodle to produce "Labradoodles" is an example of

hybridization.

4

Which of these is NOT a reason that Mendel used pea plants as a model to study inheritance?

They cannot self-fertilize.

5

A homologous pair of sister chromatids will possess _______ copies of the alleles for each locus.

8

6

In mammals, males are ________ and females are ____________.

hemizygous, homozygous

7

When a single-gene mutation can have phenotypic effects at multiple stages of development, it is

pleiotropic.

8

What is the difference between the blood types, A, B, and O?

A and B individuals have different modifications made to their carbohydrate tree. O individuals have no modifications made to their carbohydrate tree.

9

The color of petunia flower can be changed from red to blue by altering the pH of the soil. This is an example of

norm of reaction.

10

T or F
The sex of all animals is determined by chromosomes.

False

11

The single-factor crosses performed by Mendel support the observation that

the two alleles for a given gene are distributed randomly among an individual's gametes.

12

T or F
A locus encodes different genes in different individuals of the same species.

False

13

The Xist gene product

All of these statements are correct.
is never translated into protein.
is required for the production of Barr bodies.
coats the X chromosome with RNA.
associates with proteins to compact the chromosome.

14

The inheritance pattern in which the mother provides gene products to the developing egg cells is called

maternal effects.

15

Barr bodies will

be formed in both males and females, depending on the number of X chromosomes possessed by an individual.

16

In plants, most chloroplasts are inherited from the maternal plant because maternal gametes contribute the most __________ to the zygote.

cytoplasm

17

Which of the following diseases is not caused by a mutation in a mitochondrial gene?

Turner Syndrome

18

You discover a gene that results in a complete lack of hair in rats, and you name the gene "chromedome." A cross of homozygous normal and homozygous bald rats results in all bald rats. You conclude that the baldness allele is dominant, but when you repeat the cross with different rats none of the offspring are bald. Extremely puzzled you study your records and discover that in the first cross the bald rat was female, while in the second cross the bald rat was male. What do you conclude from this information?

Chromedome is imprinted in females.

19

DNA methylation of a gene during spermatogenesis would result in

the inactivation of the paternal allele in the offspring.

20

T or F
Epistasis often involves genes of an enzymatic pathway.

True

21

T or F
The actions of Xist result in an organism that is a phenotypic mosaic.

True

22

T or F
The DNA methylation state of a zygote will be maintained throughout the life of the organism and then passed on unchanged to its offspring.

False

23

If a plant species exhibits maternal inheritance for leaf pigmentation, what is the phenotype of the parents of a variegated (green and white leaves) plant?

The maternal plant must be variegated and the paternal plant can be any color.

24

Which of the following statements is not part of Morgan's Theory of Independent Assortment?

Linked genes are always inherited together.

25

A modification of a gene or chromosome that occurs during gamete formation or early development which permanently alters the expression of that gene for the lifetime of the individual is called

epigenetic inheritance.

26

Which of the following is not evidence supporting the Lyon hypothesis of X inactivation?

A genetically normal male cat can never be calico.

27

What quality of the traits that Mendel chose to study allowed him to establish the basic laws of inheritance?

The alleles that he studied were either dominant or recessive.

28

T or F
Mendel's laws do not adequately explain all the patterns of inheritance.

True

29

T or F
The DNA methylation state of a zygote will be maintained throughout the life of the organism and then passed on unchanged to its offspring.

False

30

If a testcross for two different traits produces more nonrecombinant than recombinant offspring, then the alleles for the two traits

are on the same chromosome.

31

A plant cell contains _____ genomes and an animal cell contains ______ genomes.

3,2

32

The genomes of mammalian mitochondria contain

a total of 37 genes.
All of the items listed are correct.
genes whose products are used in translation of mRNA.
ribosomal genes.
genes for proteins used in oxidative phosphorylation.

33

A trait that is expressed as a continuum rather than as a few discrete phenotypes is

codominant.

34

T or F
Genomic imprinting can result in offspring with identical genotypes that have different phenotypes.

True

35

Which of the following organelle(s) has/have a genome separate from the genome in the cell nucleus?

mitochondria and chloroplast

36

The karyotype of a young patient shows two Barr bodies per cell. What condition might this child have?

Triple X syndrome

37

T or F
In biparental inheritance, paternal and maternal gametes provide chloroplasts to the zygote.

True

38

T or F
Epistatic gene interactions do not follow Mendel's laws of inheritance.

False

39

T or F
Paternal inheritance occurs in plants but not animals because animals do not have chloroplasts.

False