EBK WHAT IS LIFE? A GUIDE TO BIOLOGY
3rd Edition
ISBN: 9781319030810
Author: PHELAN
Publisher: YUZU
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Chapter 7, Problem 15MC
Summary Introduction
Introduction:
According to the law of independent assortment “allele pairs for different genes separate independently in meiosis, so the inheritance of one trait generally does not influence the inheritance of another trait”.
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Curley hair is due to a dominant allele and while straight hair is due to a recessive allele in humans. The heterozygous condition results in wavy hair texture. Two parents that both have wavy hair will have children with which possible hair textures?
a) Curley b) Straight c) Wavy d) all of the above
Circle any inheritance patterns that could explain this pedigree. Assume individuals marrying into the family do not have a mutant allele. Please refer to the image attached.
A) Paternally imprinted
B) Maternally imprinted
C) Maternal inheritance
D) Autosomal recessive
E) Autosomal dominant
F) X-linked recessive
G) X-linked dominant
We now understand that there are exceptions to Mendel's principles. For example, the inheritance pattern where two or more genes do NOT assort independently because they are on the same chromosome is called:
a) Mendelian inheritance
b)linkage
c)genomic imprinting
d) dominance
e) epistasis
Chapter 7 Solutions
EBK WHAT IS LIFE? A GUIDE TO BIOLOGY
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- A type of inheritance in which a physical trait shows uninterrupted variation within a population. a) incomplete dominance b) polygenic inheritance c) dominant-recessive inheritance d) multiple-allele inheritancearrow_forwardIn a multigenerational study of a family, 8% of the males and 8% of the females have red hair. What may be the cause of this? A)Autosomal inheritance B)Environmental influence C)Sex-linked inheritance D)Non-somatic inheritancearrow_forwardA cross between a horse homozygous for red hair and a horse homozygous for white hair results in offspring with the coat colour called roan. When you look at the fur of the roan offspring you see both red and white hairs. What type of inheritance best explains this? a) blending inheritance b)codominance c)incomplete codominance d)multiple allelesarrow_forward
- In humans, blood type is controlled by a gene with three alleles, as shown in the following table: Blood type Genotype IA, IO IA, IA IB, IO IB, IB IA, IB A AO AA BO BB AB AB 00 What type of non-Mendelian inheritance is represented by these alleles? O a) Pleiotropy O b) Multiple alleles OC) Epistasis d) Lethal allelesarrow_forwardPKU is a recessive disorder based on a single mutant gene. Consider that Noor is a carrier, but her partner Hamza has never had an incidence of PKU show up in his family history, which dates back to four generations. What is the likelihood their first child might develop PKU according to their genetics counselor? a) 100%! b) 50% c) 25% d) 0%arrow_forwardWhat is Polygenic Inheritance? A) When one gene has many effects B) The additive effect of 2 or more genes C) The genes that cause skin colorarrow_forward
- Below is a pedigree of a human genetic disease in which solid color indicates affected individuals. Assume that the disease is caused by a gene that can have the alleles A or a. a) Based on this pedigree, what is the most likely mode of inheritance? b) What is/are the possible genotype/s of person 1? c) What is/are the possible genotype (s) of person 4 ? Explain your answers.arrow_forwardSuppose that a grandfather, mother, and son all have the same homozygous dominant genotype for a gene that controls facial hair growth. The grandfather and son have thick beards, but the mother has no significant facial hair. What type of hon-Mendelian inheritance is this? Oa) Sex-influenced inheritance O b) Sex-limited inheritance Oc) Onset of genetic expression D d) X-linked dominant inheritancearrow_forwardSuppose that a grandfather, mother, and son all have the same homozygous dominant genotype for a gene that controls facial hair growth. The grandfather and son have thick beards, but the mother has no significant facial hair. What type of non-Mendelian inheritance is this? O a) Sex-influenced inheritance Ob) Sex-limited inheritance Oc) Onset of genetic expression O d) X-linked dominant inheritancearrow_forward
- Sickle cell anemia is a recessive trait in humans. In a cross between a father who has sickle cell anemia and a mother who is heterozygous for the sickle cell allele, what is the probability that both of their first two children will be affected? A) none B) 1/16 C) 1/8 D) ¼ E) ½arrow_forward1 The pedigree chart is for a family, some of whose members exhibit a particular trait. Affected individuals are indicated by a dark square or circle. T ♫ The most likely mode of inheritance for the pedigree above is? a) X linked dominant Ob) X linked recessive Oc) Y linked Od) Autosomal dominant MacBook Proarrow_forward24) If you were Gregor Mendel and observed that some green peas had a round texture and some green peas had a wrinkled texture, then this would support which theory? A) The law of segregation B) Incomplete dominance C) Some traits are dominant, while others are recessive D) The law of independent assortmentarrow_forward
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