Chapter 29

Question 0

What is the name of the condition when a person has inherited the genotype HH?

Answer 0

Homozygous dominant

Question 1

Two of the 46 chromosomes are _____ _____ (X & Y) which determine genetic sex (male =XY, female = XX).

Answer 1

Sex chromosomes

Question 2

An allele that can be masked or suppressed by another allele is said to be

Answer 2

Recessive

Question 3

When the two alleles controlling a trait are the same, a person is said to be ____

Answer 3

Homozygous

Question 4

When the two alleles are different, the individual is _____

Answer 4

Heterozygous

Question 5

An allele masks or suppresses the expression of its partner??

Answer 5

Dominant

Question 6

Inherited traits determined by genes on the sex (X or Y) chromosomes are said to be ___

Answer 6

Sex-linked

Question 7

A gene found only on the X chromosomes is said to be _____

Answer 7

X-linked

Question 8

Inheritance that results in continuous or qualitative phenotypic variations between two extremes; an example is skin color

Answer 8

Polygene inheritance

Question 9

The dominant gene is expressed when present, the recessive gene is expressed only in absence of the dominant gene is ______ ____

Answer 9

Dominant-recessive inheritance

Question 10

The heterozygote has a phenotype intermediate between those of the homozygous dominant and homozygous recessive is ______ ____

Answer 10

Incomplete dominance

Question 11

Inheritance of the ABO blood group type is an example of this type of inheritance ______ ____ ____

Answer 11

Multiple-allele inheritance

Question 12

_ is a noninvasive method for predicting genetic disease. Also traces a genetic trait through several generations and helps predict the future.

Answer 12

Pedigree

Question 13

Pedigrees and blood tests are both means of _____ _____

Answer 13

Carrier recognition

Question 14

_____ _____ is used when there is a known risk of a genetic disorder.

Answer 14

Fetal testing

Question 15

The most common type of fetal testing is ______, in which a wide-bore needle is inserted into the amniotic sac through the mother’s abdominal wall, & about 10ml of fluid is withdrawn.

Answer 15

Amniocentesis

Question 16

Genetic makeup

Answer 16

Genotype

Question 17

How genetic makeup(genotype) is expressed

Answer 17

Phenotype

Question 18

Chromosomes that dictate most body characteristics

Answer 18

Autosomes

Question 19

Alternate forms of the same gene

Answer 19

Alleles

Question 20

A simple diagram, called the ____ _____ is used to figure out for a single trait the possible gene combinations that would result from the mating of parents of known genotypes.

Answer 20

Punnett square

Question 21

The number of different gamete types resulting from this _____ _____ of homologues during meiosis 1 can be calculated for any genome from formula 2^n where n is the number of homologous pairs.

Answer 21

Independent assortment

Question 22

The two alleles determining each trait are _____ which means that they are distributed to different gametes.

Answer 22

Segregated

Question 23

__ __ is a fatal nervous system disease involving degeneration of the basal nuclei

Answer 23

Huntingtons disease

Question 24

____ ___ somehow tags the genes as paternal or maternal and confers important functional differences in the embryo.

Answer 24

Genomic imprinting

Question 25

Produce phenotypes that mimic conditions that may be caused by genetic mutations (permanent transmissible changes in the DNA) are called?

Answer 25

Phenocopies

Question 26

Individuals with a double dose of the sickling allele (ss) have _____ ____

Answer 26

Sickle cell anemia

Question 27

Individuals heterozygous for the sickling gene (Ss) have _____ ___

Answer 27

Sickle cell trait

Question 28

Are pairs of chromosomes one from the father and one from the mother that look similar and carry genes for the same traits but do not necessarily bring about the same expressions of those traits (pair of shoes)

Answer 28

Homologous chromosomes

Question 29

The diploid chromosomal complement displayed in homologous pairs?

Answer 29

Karyotype

Question 30

The diploid ____ or genetic DNA makeup represents two sets of genetic instructions one from the egg and the other from the sperm.

Answer 30

Genome

Question 31

Have mixed contributions from each parent?

Answer 31

Recombinant chromosomes

Question 32

As a result of the ______ two of the four chromatids present in the tetrad end up with a mixed set of alleles some maternal and some paternal.

Answer 32

Crossover

Question 33

A single egg is fertilized by a single sperm in a random manner

Answer 33

Random fertilization

Question 34

Chorionic villa are sampled and karyotyped for genetic abnormalities

Answer 34

Chorionic villa sampling (cvs)

Question 35

Reflects activity of mitochondrial DNA.

Answer 35

Extranuclear

Question 36

When two genes are on the same chromosome, they are considered ____

Answer 36

Linked

Question 37

The gene responsible for the condition known as sickle cell anemia demonstrates ____

Answer 37

Incomplete dominance