Linkage and Recombination in Fruit Flies Genetics

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What defines complete linkage between genes?

Genes are so close together on a chromosome that they are always inherited as a single unit (correct)
Genes are located far apart on different chromosomes
Genes are located on the X chromosome
Genes only show phenotypic differences when a mutation occurs in one of them

What is a characteristic of syntenic genes?

They are always located on different chromosomes
They are always located close together on the same chromosome (correct)
They cannot undergo crossing over
They show phenotypic differences even when inherited together

In the context of genetic mapping, what are markers used for?

To determine the color of an organism
To show unique genetic patterns associated with certain diseases or traits (correct)
To identify genes with complete linkage
To differentiate between male and female offspring

When can genes that exhibit complete linkage be differentiated as separate entities?

When a mutation occurs in one of them (B) Signup and view all the answers

Which sex of fruit flies enables crossing over to occur?

Female (C) Signup and view all the answers

What is a characteristic of recombinants in genetics?

They result from crossing over (C) Signup and view all the answers

What is genetic recombination?

The exchange of genetic material between different regions of the same chromosome (A) Signup and view all the answers

According to Morgan, what affects the frequency of recombination?

The distance between genes on a chromosome (B) Signup and view all the answers

What does increased distance between genes on a chromosome result in during recombination?

Higher likelihood of being separated (B) Signup and view all the answers

What determines the strength of linkage between two genes?

Distance between genes on the chromosome (D) Signup and view all the answers

How does complete linkage affect the inheritance of genes?

Genes are always inherited together (C) Signup and view all the answers

In which type of linkage are genes more likely to be separated during recombination?

Incomplete linkage (B) Signup and view all the answers

What is the defining characteristic of incomplete linkage?

Recombinant gametes occur less often than parental gametes (C) Signup and view all the answers

What is statistical linkage based on?

Deviation from independent assortment (D) Signup and view all the answers

Which statement accurately describes syntenic genes?

They may or may not exhibit genetic linkage (C) Signup and view all the answers

What did Thomas Hunt Morgan propose in relation to crossing over and recombination?

Crossing over breaks the linkage between genes (B) Signup and view all the answers

How does incomplete linkage differ from complete linkage?

Recombinant gametes occur more often in incomplete linkage (B) Signup and view all the answers

What is the primary factor that determines the frequency of recombination according to Thomas Hunt Morgan?

The distance between genes on a chromosome (C) Signup and view all the answers