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Question 21

a variety in the androgen receptor

Answer 21

Male pattern baldness is influenced by

Question 22

X

Answer 22

Male pattern baldness is linked to markers on the __-chromosome

Question 23

heart disease, high blood pressure and prostate cancer

Answer 23

Bald males are more likely to suffer from

Question 24

did not

Answer 24

Scientists found that some pairs of genes (did/did not) separate according to Mendel’s principles. What is correct did or did not?

Question 25

each individual diploid organism possesses two alleles at a locus that separate in meiosis with one allele going into each gamete.

Answer 25

Principle of segregation is?

Question 26

it provides additional information about the process of segregation; it tells us that, in the process of separation, the two alleles at a locus act independently of alleles at other loci.

Answer 26

Principle of independent assortment is?

Question 27

Genes that are located close together on the same chromosome. The linked genes belong to the same linkage group.

Linked genes travel together in meiosis, eventually arriving at the same destination (the same gamete) and are not expected to assort independently.

Closely linked genes are rarely reshuffled.

It was proposed in the early 1900s by Sturtevant that the degree of linkage may depend on the position of the genes on the chromosome. Sturtevant produced the first chromosome map of the X-chromosome of Drosophila melanogaster

Linked genes will give variations on the 9:3:3:1 ratio expected from an independent dihybrid cross

Answer 27

What are linked genes?

Question 28

do not

Answer 28

Genes located on the same chromosome ___ ___ adhere strictly to Mendel’s principles

Question 29

the independent separation of alleles, or the sorting of alleles into new combinations.

Answer 29

Recombination is?

Question 30

recombinant gametes

Answer 30

Gametes produce in F1 that are different from parent gametes are

Question 31

Walter Sutton in 1903. Theory states that genes are found on chromosomes, or chromosomes are the carriers of genetic material and showed that chromosomes separate during meiosis

Answer 31

What is the chromosome theory of heredity and who came up with it and when?

Question 32

together

Answer 32

Genes close together on the same chromosome usually segregate as a unit and are therefore inherited ______

Question 33

1. cross over
2. apart
3. apart

Answer 33

1. Genes located on the same chromosome will sometimes _____ ______
2. The further the genes are _____ the more often crossing over will take place between them
3. Ultimately, they will be inherited as non-linked genes as long as they are far enough _____ on the same chromosome

Question 34

crossing over, rarely

Answer 34

If genes are completely linked no ______ _______ occurs, but in realilty genes are ____ completely linked.

Question 35

independently.

Answer 35

If genes are unlinked then they assort _____

Question 36

Answer 36

The following diagram shows the difference between completely linked genes and independently assorting genes

Question 37

or parental gametes are gametes that contain only original combinations of alleles that are present in the parents.

Answer 37

What are nonrecombinant gametes?

Question 38

Progeny that display the orginal combination of traits present in the P generation or parental progeny

Answer 38

What are nonrecombinant progeny?

Question 39

gametes with new combinations of alleles. Crossing over produces recombinant gametes. Linkage is rarely complete

Answer 39

Recombinant gametes are?

Question 40

progeny with new combinations of traits formed from recombinant gametes.

Answer 40

Recombinant progeny are ?

Question 41

1. non-recombinant
2. calculated
3. distance
4. coupling and repulsion

Answer 41

1. When genes are linked and some crossing over takes place, ________ progeny dominates
2. Recombination frequency can be ______
3. Linkage is a measure for the _____ between two genes on a chromosome
4. Linkage also depends on ______ and _____