Exam 12: Complex Inheritance Qa: Genetics

For each of the following phenotypes,identify the type of inheritance pattern.Write C for codominant,DR for dominant and recessive,P for polygenic,or I for incomplete dominant: A. ____ Rh negative B. ____ Wavy hair C. ____ Type AB blood D. ____ Height E. ____ Pink flowers from white and red flowered parents F. ____ Eye color

What is the genotype of females and males,respectively? (Note that the number indicates the total number of individual chromosomes.)

Imagine that twins are separated at birth.One is raised speaking only English,while the other is raised in a bilingual household and speaks both English and Spanish.Years later,the twins meet and decide to learn French together.The bilingual twin has a remarkably easy time learning French,while the other twin struggles.This difference may be explained by

Red-green color blindness is an X-linked recessive mutation.A color-blind man and a woman with normal vision have two biological children: a son with normal vision and a color-blind daughter.Describe the alleles for color blindness in the mother and father.

Up to 40% of human height can be attributed to environmental rather than genetic factors; thus,we call height inheritance

Alleles of several genes have been linked to antisocial behaviors such as criminal activity,alcoholism,and drug abuse.Imagine twins fathered by a man who spent most of his life in and out of jail for assault and battery,and struggled with drug addictions.One twin is raised in a home by parents who have similar antisocial behaviors and a long record of arrests.The other twin is raised by parents who have never been arrested and who actively participate in community outreach programs.Do you think both children are at the same risk of developing drug addictions at age 16? Why or why not?

Hair texture is a result of

Briefly explain the significance of the SRY gene.What phenotype(s)does it cause?

Hair texture is an example of incomplete dominance.A person who is homozygous dominant HH has curly hair and they mate with a person who has straight hair (homozygous recessive hh).What percentage of their offspring will have wavy hair? (Draw a Punnett square to help you figure this out.)

A person with the blood type A can donate to which types? And receive blood from which types?

Explain why males with a diseased allele on their X chromosome can only pass it along to their daughters.

A person with the O blood type recognizes which of the following blood types as foreign?

A karyotype

A man with AB blood type marries a heterozygous woman with blood type A.They have children.What percentage of their offspring would have blood type O? (Draw a Punnett square to help you figure this out.)

Investigators at a crime scene have isolated DNA from a Y chromosome and have analyzed it for its STRs.They have a prime suspect,but he is not cooperating.However,several of his relatives are willing to help by donating DNA samples.Which relative will have the most similar Y chromosome?

You have a patient who needs a lot of blood.The patient is blood type A+.How many types of blood can this patient accept?

Codominance is when

A woman who is blood type A gives birth to a child who is blood type O.The child's father is blood type O.Which of these three is heterozygous for blood type? Explain.

You are home sick with the flu and,while flipping channels,you are riveted by a talk show.The show is searching for the real father of a woman's child.None of the men admit paternity,but she insists that one of them must be the father.As the host reveals the results of the paternity test,he mentions that the results were based on STR analysis from the Y chromosome.He displays the following chart.Who does he reveal is the father?

Which blood type is known as the universal donor?