Question 1

Diagrams of gene order and spacing on chromosomes are

Accepted Answer

A linkage map shows the distance between genes on a chromosome.Please see section 10.5 for more information.

Question 2

Yellow peas are an example of

Accepted Answer

Outward appearances are phenotypes.for more information.

Question 3

A person has a recessive allele for a disease but the allele is masked by the presence of a normal dominant allele in the person.This person

Accepted Answer

A carrier can pass on an allele for a disease but does not have the disease.Please see section 10.8 for more information.

Question 4

A single chromosome has

Accepted Answer

one chromosome is a long piece of DNA with many genes on it.Please see section 10.1 for more information.

Question 5

The chromosome that determines whether a human is male or female is

Accepted Answer

The presence of a Y chromosoe makes a human male,while,in its absence,the default is female.Please see section 10.7 for more information.

Question 6

To inherit an autosomal recessive disorder requires the person receive the disease causing allele from

Accepted Answer

To be seen,any recessive trait must be inherited from both parents.Please see section 10.8 for more information.

Question 7

Having the alleles Tt is

Accepted Answer

the alleles possessed by an organism at a genetic locus is its genotype.Please see section 10.2 for more information.

Question 8

Homologous chromosomes have

Accepted Answer

Homologous chromosomes have the same genetic loci,homologous loci,on each.Please see section 10.1 for more information.

Question 9

If you cross two pea plants,one with green peas and the other with yellow peas,and all of the offspring have yellow peas,you conclude

Accepted Answer

In essence,this was a test cross.Please see section 10.2 for more information.

Question 10

If a diploid cell has 14 chromosomes,it will have

Accepted Answer

If 2n=14,then n=7.Please see section 10.1 for more information.

Question 11

Diagrams depicting family relationships and phenotypes for a genetic disorder are

Accepted Answer

Pedigree analysis can help track the gentics of disease in an extended family.Please see section 10.8 for more information.

Question 12

In pedigree charts,autosomal recessive disorders typically

Accepted Answer

Recessive phenotypes can skip generations in a pedigree because their alleles can pass from parent to grandchild masked in the F1 generation by dominant alleles.Please see section 10.8 for more information.

Question 13

Females who are "carriers" for hemophilia

Accepted Answer

Females with an allele for hemophilia usually have a non-defective allele to mask the effects of the defective hemophilia allele.Please see section 10.7 for more information.

Question 14

To inherit an autosomal dominant disorder a person could receive the disease causing allele from

Accepted Answer

Autosomal disorders,since they do not have sex linkage,can be inherited equally from either parent.Please see section 10.8 for more information.

Question 15

If you cross two heterozygous (Yy)pea plants,what proportion of the offspring will be heterozygous?

Accepted Answer

heterozygotes produce half of their progeny like themselves when crossed with the same genotype.Please see section 10.4 for more information.

Question 16

A male expresses

Accepted Answer

Since males only have one allele for loci on the X chromosome,the effects of all X alleles can be seen in males.Please see section 10.7 for more information.

Question 17

Hemophilia A is caused by

Accepted Answer

Hemophilia A is sex-linked and thus shows up much more in human males than in human females.Please see section 10.7 for more information.

Question 18

If a genetic counselor examines a pedigree chart and notices an occurrence of a disease in every generation,the counselor would assume that the disease was caused by

Accepted Answer

Dominant alleles can be seen no matter what the other copy of the gene in a diploid organism is like.Please see section 10.8 for more information.

Question 19

In pedigree charts,autosomal dominant disorders typically

Accepted Answer

Dominant traits show up generation after generation because only one copy of the allele for the disease is needed for the disease to show uo in a phenotype.Please see section 10.8 for more information.

Question 20

If you cross two pea plants,one with green peas and the other with yellow peas,and all of the offspring have yellow peas,you conclude

Accepted Answer

Dominant alleles mask recessive alleles.Please see section 10.2 for more information.

Quiz 10: Patterns of Inheritance

Diagrams of gene order and spacing on chromosomes are

Yellow peas are an example of

A person has a recessive allele for a disease but the allele is masked by the presence of a normal dominant allele in the person.This person

A single chromosome has

The chromosome that determines whether a human is male or female is

To inherit an autosomal recessive disorder requires the person receive the disease causing allele from

Having the alleles Tt is

Homologous chromosomes have

If you cross two pea plants,one with green peas and the other with yellow peas,and all of the offspring have yellow peas,you conclude

If a diploid cell has 14 chromosomes,it will have

Diagrams depicting family relationships and phenotypes for a genetic disorder are

In pedigree charts,autosomal recessive disorders typically

Females who are "carriers" for hemophilia

To inherit an autosomal dominant disorder a person could receive the disease causing allele from

If you cross two heterozygous (Yy) pea plants,what proportion of the offspring will be heterozygous?

A male expresses

Hemophilia A is caused by

If a genetic counselor examines a pedigree chart and notices an occurrence of a disease in every generation,the counselor would assume that the disease was caused by

In pedigree charts,autosomal dominant disorders typically

If you cross two pea plants,one with green peas and the other with yellow peas,and all of the offspring have yellow peas,you conclude