9118633
Descrição
Questão 1
Questão
Which parents determines the sex of the offspring?
Responda
-
Mother
-
Father
Questão 2
Questão
A male fruit fly is white eyed, which is recessive, and an X-linked gene. What term would we use to describe its genotype?
Responda
-
Homozygous recessive
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Heterozygous recessive
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Hemizygous recessive
Questão 3
Questão
A male fruit fly carries an X chromosome with a white eyed allele, and is mated with a female homozygous for red eye alleles. Which statement would be true?
Responda
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All offspring will have white eyes.
-
All male offspring will have white eyes.
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All daughters will be heterozygotes.
Questão 4
Questão
A colour blind male mates with a homozygous non colourblind female. Which statements are true?
Responda
-
All sons are colourblind.
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None of the sons will be colourblind.
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All daughters will be carriers.
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There is a 50% chance one of the children will be colourblind.
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If one of the daughters has offspring with a non-colourblind male, there is a 50% chance that their son will be colourblind.
Questão 5
Questão
You perform a dihybrid cross between a heterozygote and a homozygous recessive individual. Instead of the expected 1:1:1:1 ratio, the parental types are far more common and only a small ratio of the offspring are recombinants. What can you conclude and why?
Responda
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The genes did not assort independently because they are linked on the same chromosome.
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The genes did not assort independently because there was a failure to separate during anaphase I.
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The genes being tested for actually do not segregate and are alleles.
Questão 6
Questão
Theoretically meiosis should cause all [blank_start]gametes[blank_end] to have the [blank_start]parental[blank_end] type if genes being observed are [blank_start]linked[blank_end].
Responda
-
gametes
-
parental
-
linked
Questão 7
Questão
Which statement best describes recombinant frequency?
Responda
-
The number of times recombination occurs during meiosis.
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The proportion of recombinant gametes that are produced.
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The number of recombinant individuals in a population.
Questão 8
Questão
The larger the distance between two genes the less likely a chiasmata will be formed between them.
Responda
- True
- False
Questão 9
Questão
A small recombinant frequency indicates a small distance between genes.
Responda
- True
- False
Questão 10
Questão
What is the maximum recombination frequency?
Responda
-
100%
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50%
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49.9%
Questão 11
Questão
Choose the correct statements about genetic map units.
Responda
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They are arbitrary.
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They are also known as cM, centimacrometres.
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They are also known as cM, centimorgans.
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The number of map units can be calculated by multiplying the recombinant frequency by 100.
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The number of map units can be calculated by dividing the recombinant frequency by 100.
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