Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 8, Problem 2LTB
Summary Introduction
To detrmine:
The meaning of the sentence,' a gene has multiple allele'.
Whether a gene can have more than two allele for a single trait.
Introduction:
The allele is the form of a single gene present in an organism. The different combination of the alleles determines the genotype and
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The allele for hitchhiker’s thumb (h) is recessive to straight thumb (H). If a man and his wife are both homozygous recessive, will any of their offspring potentially have hitchhikers thumb?
What is the man’s genotype and the woman’s genotype?
What is the man’s phenotype and the woman’s phenotype?
What genotype(s) must the offspring have in order to have the phenotypic trait of hitchhiker’s thumb?
Do a cross to determine all potential hitchhiker’s thumb genotypes and phenotypes for the offspring of this man and woman. Is it possible for any offspring of the F1 generation to have hitchhiker’s thumb?
Why are some alleles dominant to other alleles?
What are two of the same alleles for a trait?
Chapter 8 Solutions
Biology: Science for Life with Physiology (5th Edition)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- How do geneticists know whether a particular trait is caused by the alleles of one gene or by two genes interacting in one of a number of possible ways?arrow_forwardWhat is Mendel’s law of segregation? Allele pairs separate during the formation of gametes, and pair back up upon fertilisation. During meiosis, the alleles of two or more genes separate into the gametes independent of each other. During meiosis. genetic material segregates equally into the resulting gametes. The separation of alleles into different gametes results in genetically distinct offspring. During meiosis, genes that are in close proximity on the genome are more likely to cross over together.arrow_forwardWhy are some alleles dominant and some recessive?arrow_forward
- In genetics, what does a genotype of Hh signify? Choose 1 answer: Choose 1 answer: (Choice A) A Homozygous; two dominant alleles (Choice B) B Homozygous; two recessive alleles (Choice C) C Heterozygous; one dominant allele and one recessive allele (Choice D) D Homozygous; one dominant allele and one recessive allelearrow_forwardIn humans, the alleles for unattached earlobes is dominant over the allele for attached earlobes. The allele for dark hair dominates the allele for light hair. If both parents are heterozygous for earlobe attachment and hair color, what types of offspring can they produce, and what is the probability for each type?arrow_forwardWhat is a dimorphism? A trait with two distinct forms originating from the interaction of two alleles of a single gene A trait with three or more distinct forms linked to multiple alleles of a single gene A trait consisting of a continuous spectrum of forms influenced by the interaction of multiple genes and multiple allelesarrow_forward
- If there are five alleles at a locus, how many genotypes can there be at this locus? How many different kinds of homozygotes can there be? How many genotypes and homozygotes can there be with eight alleles at a locus?arrow_forwardWhat is the phenomenon of a single gene determining a number of distinct and seemingly unrelated characteristics?arrow_forwardEye Color is a trait that involves a number of genes. To simplify our example, we can break down the traitinto two phenotypes: dark color and light color eyes. Dark coloration is considered dominant, or isexpressed in a heterozygous condition (when the alleles are different).Q: If you have one light eyed parent and one parent that is homozygous for dark eye color, what are thepotential eye colors of their offspring (young)? To start, what do the Parents’ alleles look like? What istheir Genotype? (Remember, you pick which letter you want to use)Light eye colored parent:Dark eye colored parent:One of the things Mendel designed was a way to provide information about how the genes are passed onfrom parent to offspring. He designed something called a Punnett Square. This square places the parents’alleles outside the box, then uses those alleles to fill in the squares.Let’s start with a reminder of what we know about the parents: Parent Phenotype(appearance) Genotype(alleles) 1 2arrow_forward
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