White-feathered leghorn and Wyandotte are crossed and surprisingly 3 of their offspring have colored feathers. Which of the following cani describe the gene interaction involved? A. The dominant version of the first gene can only produce color in the absence of the dominant version of the second gene. B. The dominant version of the second gene can only produce color in the absence of the dominant version of the first gene. C. At least one dominant version of each gene is needed to express color. D. At least one recessive version of each gene is needed to express color.
White-feathered leghorn and Wyandotte are crossed and surprisingly 3 of their offspring have colored feathers. Which of the following cani describe the gene interaction involved? A. The dominant version of the first gene can only produce color in the absence of the dominant version of the second gene. B. The dominant version of the second gene can only produce color in the absence of the dominant version of the first gene. C. At least one dominant version of each gene is needed to express color. D. At least one recessive version of each gene is needed to express color.
Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
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Transcribed Image Text:-1 es
White-feathered leghorn and Wyandotte are crossed and
surprisingly 3 of their offspring have colored feathers.
Which of the following can describe the gene interaction
involved?
A. The dominant version of the first gene can only
produce color in the absence of the dominant version
of the second gene.
B. The dominant version of the second gene can only.
produce color in the absence of the dominant version
of the first gene.
C. At least one dominant version of each gene is needed
to express color.
D. At least one recessive version of each gene is needed
to express color.
-1 attachment
Alleles for hemophilia are considered semi-lethal
genes because:
A. The genes cause death to only some of the individuals
affected with hemophilia.
B. The alleles can only be expressed under certain
environmental conditions.
2.
C. Individuals with the dominant variant of the gene die
early.
D. All individuals with 2 doses of the recessive allele die
during embryonic development.
-1 atacnment-
Which of the following is an example of intra
allelic genetic interactions?
3.
A. Complete dominance
B. Intermediate dominance
c. Codominance
D. All of the above
4.
Two summer white squashes with genotype WwYy
were crossed (W= white color, Y=yellow color, w
and y= green color) W is epistatic to Y and y. What
would be the different colors of summer squashes
obtained out of the above cross? (2 pts.)
A. 12 white: 3 yellow:1 green
B. 12 yellow: 3 white: 1
C. 12 green: 1 white: 3 yellow
D. 12 yellow: 3 green: 1 white
green
Transcribed Image Text:1 attachment -
The union of gametes carrying different alleles
produces a heterozygous,
dominant allele is expressed and observed in the
5.
and the
A. phenotype...genotype
B. genotype...phenotype
C. genotype...genotype
D. phenotype...phenotype
-1 attachment -
Which of the following has contributed to the
success of Gregor Mendel's garden pea
experiments?
A. Garden peas require longer time to mature.
B. Mendel used heterozygous plants in the parental
generation.
C. Mendel used varieties that only differ in one trait.
D. Garden peas would only produce few offspring every
6.
generation.
E. Not using statistics in the analysis of his results.
-1 attacnment-
If these two individuals with the following genotypes
are crossed
Parent 1:
7.
AAbbCCDDeeFf
aaBBccddEEFf
Parent 2:
What is the expected genotypic ratio of the F,
generation? (3 pts)
A. ¼ AaBbCcDdEeFf: ½ AaBbCcDdEeFF: ¼ AaBbCcDdEeff
|
B. ½ AaBbCcDdEeFf: ½ AaBbCcDdEeff
C. 1 AaBbCcDdEeFF: 1 AaBbCcDdEeFf: 1 AaBbCcDdEeff
D. 4 AABBCCDDEEFF: ½ AaBbCcDdEeFf: ¼ AaBbCcDdEeff
8.
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