Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 12, Problem 15RQ
If the allele encoding polydactyly (six fingers) is dominant why do most people have five fingers?
- Genetic elements suppress the polydactyl gene
- Polydactyly is embryonic lethal
- The sixth finger is removed at birth
- The polydactyl allele is very rare in the human population.
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To understand this research, you must be familiar with some basic genetic terminology.
Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Not all terms will be used.
dominant allele
phenotype
The possession of two different alleles of a particular gene is referred to as
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A variation in a DNA sequence at one particular position is called a
heterozygosity
genotype
recessive allele
homozygosity
single nucleotide
polymorphism
The appearance of the organism, its observable traits, are referred to as the
A variant of a gene for which an individual must be homozygous in order for it to influence the
appearance of the organism is a
The set of alleles an organism has for a particular trait is the organism's
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In humans, an X-linked disorder called coloboma iridia (a fissure in the iris_ is a recessive trait. A normal couple has an afflicted daughter. What would be the most plausible scenario for this situation?
the female is not the biological mother, but the male is the biological father
the father carries one recessive allele, and the mother carries one recessive allele
the mother carries two recessive alleles
the male is not the biological father, but the female is the biological mother
both parents are heterozygous for the trait
Hb the mutant allele that causes sickle cell anemia is
because it impacts multiple
pleiotropic
polygenic
epistatic
A Moving to another question will save this response dominant.
recessive
alleles
chromosomes
genes
phenotypes
Chapter 12 Solutions
Biology 2e
Ch. 12 - Figure 12.5 In pea plants, round peas (R) are...Ch. 12 - Figure 12.6 What are the genotypes of the...Ch. 12 - Figure 12.12 What ratio of offspring would result...Ch. 12 - Figure 12.16 In pea plants, purple flowers (P) are...Ch. 12 - Mendel performed hybridizations by transferring...Ch. 12 - Which is one of the seven characteristics that...Ch. 12 - Imagine you are performing a cross involving seed...Ch. 12 - Consider a cross to investigate the pea pod...Ch. 12 - A scientist pollinates a true-breeding pea plant...Ch. 12 - The observable traits expressed by an organism are...
Ch. 12 - A recessive trait will be observed in individuals...Ch. 12 - If black and white true-breeding mice are mated...Ch. 12 - The ABO blood groups in humans are expressed as...Ch. 12 - In a mating between two individuals that are...Ch. 12 - If the allele encoding polydactyly (six fingers)...Ch. 12 - A farmer raises black and white chickens. To his...Ch. 12 - Assuming no gene linkage, in a dihybrid cross of...Ch. 12 - The forked line and probability methods make use...Ch. 12 - How many different offspring genotypes are...Ch. 12 - Labrador retriever's fur color is controlled by...Ch. 12 - Which of the following situations does not follow...Ch. 12 - Describe one of the reasons why the garden pea was...Ch. 12 - How would you perform a reciprocal cross for the...Ch. 12 - Mendel performs a cross using a true-breeding pea...Ch. 12 - Calculate the probability of selecting a heart or...Ch. 12 - The gene for flower position in pea plants exists...Ch. 12 - Use a Punnett square to predict the offspring in a...Ch. 12 - Can a human male be a carrier of red-green color...Ch. 12 - Why is it more efficient to perform a test cross...Ch. 12 - Use the probability method to calculate the...Ch. 12 - Explain epistatis in terms of its Greek-language...Ch. 12 - In Section 12.3, ''Laws of Inheritance," an...Ch. 12 - People with trisomy 21 develop Down’s syndrome....Ch. 12 - A heterozygous pea plant produces violet flowers...
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