Ch.13 genetics Flashcards
Who is considered the “father of genetics”?
Gregor Mendel
Chromosomes consist of thousands of structural and functional units called-
A) DNA
B) genes
C) alleles
D) tetrads
genes
Genes occur in pairs called-
A) bivalents
B) analogs
C) homologs
D) alleles
alleles
If the DNA sequences of a gene pair are identical, they are said to be-
A) homozygous
B) heterozygous
C) analogous
D) homologous
homozygous
The particular physical characteristics of an individual are known as the-
A) prototype
B) genotype
C) phenotype
D) archetype
phenotype
In a gene pair, the allele expressed is called the-
A) prominent
B) dominant
C) recessive
D) submissive
dominant
In ____ dominance, the expression of the ____ allele makes the expression of the ____ alleles.
A) complete, dominants, recessive
B) complete, recessive, dominant
C) incomplete, dominant, recessive
D) incomplete, recessive, dominant
complete, dominant, recessive
According to the law of___, during the formation of gametes, the alleles responsible for each trait separate so that each gamete contains only one alleles for that trait.
A) allocation
B) integration
C) segregaition
D) separation
segregation
In a population, the frequencies of two alleles for a given gene add up to__
A) 1
B) 2
C) 3
D) 4
1
Which of the following is NOT one of the human blood alleles?
A) A
B) B
C) C
D) O
C
Which of the following statements about evolution is true?
A) it involves no change in the frequency of given allele in a population
B) it occurs at the level of the individual
C) it occurs at the level of the populations
D) all of these
it occurs at the level of population
When the frequency of alleles for a gene is constant over time, that gene is said to be in genetic____?
A) equilibrium
B) homeostasis
C) isolation
D)disequilibrium
equilibrium
Which of the following is a dominant trait in humans?
A) free earlobe
B) tongue rolling
C) dimpled chin
D) all of these
all of these
According to the Hardy-Weinberg model, which condition must be met in order for genetic equilibrium to be maintained?
A) there must be no mutation
B) mating between individuals must be completely random
C) there must be no movement of individuals into or out of a population
D) all of these
all of these
Complete the Hardy-Weinberg Equation: p^2 + __ + q^2= 1
A) pq
B) 2pq
C) 2 (p+q)
D) pq^2
2pq
Which of the following regarding the use of Punnett squares is true?
A) the expected results always agree with the observed results
B) the observed results appear in the offspring as a result of random combinations of the genes
C) predictions about the observed results are based upon the laws of probability
D) the expected results never agree with the observed results
the observed results appear in the offspring as a result of random combinations of the genes
In Indian corn, the marbling seen in some of the kernels is a result of-
A) incomplete dominance
B) complete dominance
C) transposons (“jumping genes”)
D) random mutations
transposons or jumping genes
In a pedigree, a male with an inherited recessive disease would be represented by which of the following?
A) square, half-shaded
B) square, fully-shaded
C) circle, half-shaded
D) circle, fully-shaded
square, fully-shaded
The pedigree symbol of a “circle, half-shaded, connected to a square by horizontal line” represents a
A) female
B) carrier of allele for a trait
C) parent
D) all of these
all of these
If you were to toss 2 pennies, what are the odds of obtaining 2 heads?
A) 100%
B) 75%
C) 50%
D) 25%
50%
A man with type O blood arrives at the hospital emergency department needing a blood transfusion. What blood type can be safely recessive?
A) type O
B) type A
C) type B
D) type AB
type O
If a man with a dimpled chin (heterozygous) has children with a woman without a dimpled chin, what are the chances of having a child with a dimpled chin?
A) 25%
B) 50%
C) 75%
D) 100%
50%
A woman with type i^Ai^B blood donates at a local blood drive. Individuals with which of the following blood types could safely receive her blood?
A) ii
B) i^Ai^B
C) i^Ai^A
D)i^Bi^B
B i^Ai^B
Hemophilia is a sex-linked recessive bleeding disorder carried on the X chromosome. If a typical man carries a typical woman carrier, what are their odds of having a hemophiliac son?
A) 25%
B) 50%
C) 75%
D) 100%
50%
Cystic fibrosis (CF) is an inherited autosomal recessive diseases. If both parents carry the gene for CF, what are their chances of having a child with the diseases?
A) 25%
B) 50%
C) 75%
D) 100%
25%
In incomplete dominance, if a red flower is crossed with a white flower, the offspring could be-
A) red
B) white
C) pink
D) all of these
pink
You place three separate drops of your blood on a microscope slide. You then add anti-A serum to the first drop, anti-B serum to the second drop, and anti-D serum to the third drop. The first and third drops agglutinate. What is your blood type?
A) A Rh+
B) B Rh+
C) AB Rh+
D) O Rh-
A Rh+
Which of the following Rh types could result in erythroblastosis fatalis in the fetus during second pregnancy?
A) man Rh+, woman Rh+
B) man Rh-, woman Rh-
C) man Rh+, woman Rh-
D) man Rh-, woman Rh+
man Rh+, woman Rh-
A woman with blood type A (genotype i^Ai^A) is bring a paternity suit against a man with blood type O (genotype ii). The child has blood type (i^AI). Could he be the father of the child?
A) yes definitely
B) possibly
C) unlikely
D) definitely
possibly
Which of the following antisera will agglutinate type A Rh- blood?
A) anti-A and anti-D (anti-Rh)
B) anti-B and anti-D
C) anti-A only
D) anti-D only
anti-A only
