Question 1

Refer to the figure showing a pedigree of a sex-linked recessive trait.Note here that only individuals that are affected are shaded; unshaded individuals may or may not be carriers.  In generation II, female number 5 marries a man and has three children.One daughter and one son do not have the recessive trait; the other son does have the recessive trait.Based on these results, one can conclude that the mother is _______ for the trait and that the father is _______ for the trait.

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The answer of Refer to the figure showing a pedigree...

Question 2

To determine the probability of an event that can occur in two or more different ways, one should _______ the individual probabilities.

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The answer of To determine the probability of an event...

Question 3

Egg and Fluffy are two genes in a bird that are 16 map units apart.The E allele of Egg produces large eggs, and the e allele produces small eggs (E is dominant).The F allele produces fluffy feathers, and the f allele produces nonfluffy feathers (F is dominant).In a cross of EeFf with eeff, _______ percent of the offspring should produce large eggs and fluffy feathers.

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The answer of Egg and Fluffy are two genes in...

Question 4

The AB blood phenotype found in individuals with an I^AI^B genotype is an example of _______.

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The answer of The AB blood phenotype found in individuals...

Question 5

Assuming that the probability of a boy being born is 1/2, the probability that a family with four children will include 3 boys and 1 girl is _______.

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The answer of Assuming that the probability of a boy...

Question 6

Draw a Punnett square that shows a dihybrid cross with independent assortment.One gene affects whether mice have tails or are tailless, with tails being dominant.The other affects whether the mice have black or gray color, with black dominant.Write out the ratio of expected phenotypes from the cross.

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The answer of Draw a Punnett square that shows a...

Question 7

Mendel's laws of inheritance can be observed in human genetics through the study of _______.

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The answer of Mendel's laws of inheritance can be observed...

Question 8

The blue sclera allele has 75 percent penetrance for producing blue sclera, 60 percent penetrance for fragile bones, and 40 percent penetrance for deafness.If these probabilities of penetrance are independent, _______ percent of individuals with the blue sclera allele will have deafness, blue sclera, and normal bones.

Accepted Answer

The answer of The blue sclera allele has 75 percent...

Question 9

Refer to the figure.Which letter represents the stage at which the two chromosomes have segregated and are in separate daughter cells?

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The answer of Refer to the figure.Which letter represents the...

Question 10

Female Drosophila that have vermillion eyes are crossed with males that have wild-type eyes.If this allele is recessive and X-linked, then _______ percent of the sons should have vermillion eyes.

Accepted Answer

The answer of Female Drosophila that have vermillion eyes are...

Question 11

Loci A and B have a recombination frequency of 5 percent.Loci A and C have a frequency of 15 percent.Loci A and D have a frequency of 22 percent.The locus that is likely to be the most distant from locus A is locus _______.

Accepted Answer

The answer of Loci A and B have a recombination...

Question 12

In cattle, hybrids often are more reproductively fit than the purebreds.Suppose that this increased vigor in hybrids, or heterosis, is due mainly to the lack of inbreeding depression.This would then support the _______ hypothesis.

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The answer of In cattle, hybrids often are more reproductively...

Question 13

Geneticists make use of _______ frequencies to create genetic maps that show the position of genes on a chromosome.

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The answer of Geneticists make use of _______ frequencies to...

Question 14

Draw a pedigree for at least three generations and 12 individuals that shows the transmission of a dominant autosomal trait.

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The answer of Draw a pedigree for at least three...

Question 15

Suppose your paternal grandmother has a rare mitochondrial mutation.It is likely that your father _______ (has / does not have) the mutation and that you do not have the mutation.

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The answer of Suppose your paternal grandmother has a rare...

Question 16

The process in bacteria that is most analogous to sexual reproduction is called _______.

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The answer of The process in bacteria that is most...

Question 17

One particular allele of a gene may be defined as _______, or standard, because it is present in most individuals and gives rise to an expected trait, or phenotype.

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The answer of One particular allele of a gene may...

Question 18

When many genes contribute to the phenotype, variation is said to be continuous, or _______.

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The answer of When many genes contribute to the phenotype,...

Question 19

Draw a pedigree for at least three generations and 12 individuals that shows the transmission of a recessive autosomal trait.Shade affected individuals, leaving unaffected carriers and those without the mutant allele unshaded.

Accepted Answer