Question $1$

What does a $3-$point cross allow you to do$?$

a$.$

create a relative map of gene locations.$$

b$.$

create a relative map of protein locations.$$

c$.$

create a relative map of$$ RNA locations.$$

d$.$

breed fruit flies.$$

$10$ points $$

Question $2$

What are linked genes?

a$.$

genes that tend to be inherited together.$$

b$.$

genes that tend to not be inherited together.$$

c$.$

genes that give the dominant phenotype.$$

d$.$

genes that give the recessive phenotype$$

$10$ points $$

Question $3$

Which two genotypes are from flies where no crossover occurred?

Genotype

n

$+$sv

$1600$

y$++$

$1680$

ysv

$3000$

y$+$v

$400$

$+$s$+$

$350$

$+++$

$2400$

ys$+$

$50$

$++$v

$70$

a$.$

$+$sv$,$ y$++$

b$.$

ysv$,+++$

c$.$

y$+$v$,+$s$+$

d$.$

ys$+,++$v$$

$10$ points $$

Question $4$

Which two genotypes are from flies where a double crossover occurred?

Genotype

n

$+$sv

$1600$

y$++$

$1680$

ysv

$3000$

y$+$v

$400$

$+$s$+$

$350$

$+++$

$2400$

ys$+$

$50$

$++$v

$70$

a$.$

$+$sv$,$ y$++$

b$.$

ysv$,+++$

c$.$

y$+$v$,+$s$+$

d$.$

ys$+,++$v$$