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BIOLOGY CUMULATIVE STUDY QUESTIONS AND ANSWERS COMPLETE A+ GRADED FOR EXAM.
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BIOLOGY CUMULATIVE STUDY QUESTIONS AND ANSWERS COMPLETE A+ GRADED FOR EXAM.
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BIOLOGY CUMULATIVE STUDY QUESTIONS ANDANSWERS COMPLETE A+ GRADED FOR EXAM.
Quaking aspen trees can send out underground stems for asexual
reproduction. Sexual reproduction is not as common, but when it does
happen, the haploid gametes have 19 chromosomes. How many
chromosomes are in the cells of the underground stems?
Correct Answer -38
Which of the following statements is correct in comparing sexual and
asexual reproduction?
Correct Answer -In sexual reproduction, individuals transmit half of their
nuclear genes to each of their offspring.
At which stage of mitosis are chromosomes usually photographed in the
preparation of a karyotype?
Correct Answer -metaphase
Which of the following statements is true of a species that has a
chromosome number of 2n =16?
Correct Answer -Each diploid cell has eight homologous pairs of
chromosomes.
Which of the following statements is correct in describing the terms
monohybrid cross and dihybrid cross?
Correct Answer -A dihybrid cross involves organisms that are
heterozygous for two characters that are being studied, and a monohybrid
cross involves organisms that are heterozygous for only one character
being studied.
,What was the most significant conclusion that Gregor Mendel drew from
his experiments with pea plants?
Correct Answer -Traits are inherited in discrete units and are not the result
of "blending."
How many unique gametes could be produced through independent
assortment by an individual with the genotype AaBbCCDdEE?
Correct Answer -8
The individual with genotype AaBbCCDdEE can make many kinds of
gametes. Which of the following correctly describes why this situation is
possible?
Correct Answer -different possible assortment of chromosomes into
gametes occurs
Mendel continued some of his experiments into the F2 or F3 generation in
order to ________.
Correct Answer -observe whether or not a recessive trait would reappear
Which of the following statements about independent assortment or
segregation is correct?
Correct Answer -The law of independent assortment describes the
behavior of two or more genes relative to one another.
A sexually reproducing animal has two unlinked genes, one for head
shape (H) and one for tail length (T). Its genotype is HhTt. Which of the
following genotypes is possible in a gamete from this organism?
Correct Answer -HT
When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to
each other, the F2 generation included both red- and white-eyed flies.
, Remarkably, all the white-eyed flies were male. What was the explanation
for this result?
Correct Answer -The gene involved is located on the X chromosome.
Which of the following statements correctly describes the meaning of the
chromosome theory of inheritance as expressed in the early 20th century?
Correct Answer -Mendelian genes are at specific loci on the chromosome
and, in turn, segregate during meiosis.
Why are males more often affected by sex-linked traits than females?
Correct Answer -Males are hemizygous for the X chromosome.
The SRY gene is best described as ________.
Correct Answer -a gene present on the Y chromosome that triggers male
development
In cats, black fur color is determined by an X-linked allele; the other allele
at this locus determines orange color. The heterozygote is tortoiseshell.
What kinds of offspring would you expect from the cross of a black female
and an orange male?
Correct Answer -tortoiseshell females; black males
Mothers can pass sex-linked alleles to both daughters and sons.
Correct Answer -true
Cinnabar eye color is a sex-linked, recessive characteristic in fruit flies. If a
female having cinnabar eyes is crossed with a wild-type male, what
percentage of the F1 males will have cinnabar eyes?
Correct Answer -100 %
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