How does the map unit correlate with recombination frequency? a. There is no correlation between recombination frequency and...

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Biology

How does the map unit correlate with recombinationfrequency?
a.
There is no correlation between recombination frequency and mapunits.
b.
The number of map units is inversely proportional to therecombination frequency between genes.
c.
1 map unit is equal to 10% recombination.
d.
1 map unit is equal to 1% recombination.
A white-eyed Drosophila female would have thegenotype:
a.
X^WX^W
b.
X^WX^w
c.
X^wX^w
d.
X^WY
e.
X^wY
Cinnabar eyes is a sex-linked recessive trait in Drosophila. Ifa cinnabar female is mated with a normal male, what percentage ofthe F1 males will have cinnabar eyes?
a.
0%
b.
50%
c.
100%
d.
75%
e.
25%
Gene S controls the sharpness of spines in a species of cactus.SS and Ss individuals have sharp spines and ss individual have dullspines. A second gene determines whether the cactus has spines atall. NN and Nn individuals have spines and nn individuals have nospines. The relationship between the alleles at these two loci isbest described as ________________.
a.
pleiotropy
b.
codominance
c.
incomplete dominance
d.
complete dominance
e.
gene-by-gene interaction
How does crossing over break up linkage between alleles?
a.
It allows male and female gametes to combine randomly atfertilization.
b.
It involves a physical exchange of segments between homologouschromosomes.
c.
It involves a physical exchange of segments between sisterchromatids.
d.
It causes alleles on nonhomologous chromosomes to be inheritedindependently.

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Q1 A map unit is related to the recombination frequency if the genes have the distance of 1 map unit the recombination frequency is 1 Therefore option D is the correct Q2 Since the eye colour in Drosophila is a Xlinked See Answer

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	a.	There is no correlation between recombination frequency and mapunits.
	b.	The number of map units is inversely proportional to therecombination frequency between genes.
	c.	1 map unit is equal to 10% recombination.
	d.	1 map unit is equal to 1% recombination.

	a.	pleiotropy
	b.	codominance
	c.	incomplete dominance
	d.	complete dominance
	e.	gene-by-gene interaction

	a.	It allows male and female gametes to combine randomly atfertilization.
	b.	It involves a physical exchange of segments between homologouschromosomes.
	c.	It involves a physical exchange of segments between sisterchromatids.
	d.	It causes alleles on nonhomologous chromosomes to be inheritedindependently.