8.1 5 Gene Linkage

Question 1

Linked genes

Answer 1

They are sited on the same chromosome and inherited as if they are one unit

Question 2

Completely unlinked genes

Answer 2

Approximately equal number of gametes containing parental and recombinant alleles

Question 3

When genes are closely linked

Answer 3

Recombination events during meiosis rarely occur in the gametes

Question 4

Large amounts

Answer 4

Or parental phenotypes

Question 5

Crossover value

Answer 5

Number of recombinant offspring /total number of offspring * 100

Question 6

Further part genes

Answer 6

Have higher crossover values

From this can build a chromosome map bioinformatics

Question 7

Homogametic

Answer 7

Individual produces gametes that contain only one type of sex chromosome

Question 8

Heterogametic

Answer 8

Gametes that contain two different types of sex chromosome

Question 9

In females

Answer 9

One of the X chromosomes is inactivated at random to form a Barr body

Question 10

X chromosome

Answer 10

Much bigger than Y chromosome

Question 11

Gene carried on X chromosome

Answer 11

Sex-linked - no corresponding allele on y