Genetic Inheritance: Key Concepts and Practice Questions
School
Middlesex County College**We aren't endorsed by this school
Course
BIOLOGY 135
Subject
Biology
Date
Dec 12, 2024
Pages
3
Uploaded by SargentArtGoldfinch44
Jessica Pereira da Silva1.. The chance of a child having albinism when both of his parents are heterozygous for the disorder is _25_percent.a. 0b. 25c. 33d. 50e. 752. In autosomal dominant inheritance, two affected individuals may have unaffected children.a. the trait often skips generationsb. about one-fourth of the progeny in a pedigree will show the traitc. two affected individuals may have unaffected childrend. males are more affected than femalese. the aa phenotype will be affected3.. If a man expresses an X-linked recessive trait, his mother was heterozygous or homozygous for the trait.a. all of his brothers will also express itb. his father transmitted the trait to himc. his father carried the traitd. all of his sisters will also express ite. his mother was heterozygous or homozygous for the trait4.. If two phenotypically normal parents have six children, and two daughters and two sons have the same genetic disorder, that disorder is most likely to be cystic fibrosis.a. hemophiliab. cystic fibrosisc. Marfan syndrome
d. muscular dystrophye. color blindness5.. Y-linked traits are carried only by males and transmitted only to males.a. known as homozygous traitsb. known to skip generations in malesc. carried only by males and transmitted only to malesd. carried only by females, but are never expressede. passed on to only 50% of female progeny6.. If two phenotypically normal parents have six children, and two daughters and two sons have the same genetic disorder, that disorder is most likely to be cystic fibrosis.a. hemophiliab. cystic fibrosisc. Marfan syndromed. muscular dystrophye. color blindness7. One goal of pedigree analysis is to determine whether a gene has a dominant or recessive pattern of inheritance.a. what diseases a family will displayb. if two people are relatedc. gene locid. whether a gene has a dominant or recessive pattern of inheritancee. what treatment a person should undergo8. If a pedigree of several generations shows only females affected by a particular trait, it cannot be a(n) Y-linkedtrait.a. autosomal recessiveb. autosomal dominantc. Y-linked
d. X-linked recessivee. X-linked dominant9.. One characteristic of an autosomal dominant trait is that every affected individual has at least one affected parent.a. 50% of individuals with two affected parents will be affectedb. if two affected individuals are homozygous, the risk of having an affected child is 1:4c. heterozygous fathers will always have affected daughtersd. every affected individual has at least one affected parente. mothers always pass the trait on to their sons10.Mitochondria are transmitted from mothers to all of their children through the cytoplasm of the egg.a. all of their daughters through the cytoplasm of the eggb. all of their sons through the cytoplasm of the eggc. all of their children through the cytoplasm of the eggd. 50% of their children through the X chromosomee. 50% of daughters through the X chromosome