79. Which of the following might affect the inheritance pattern of organismal traits?Additive effect of genesEpigenetic effectsEpistasisCrossing over in meiosis

The trait is the DNA sequence. It influences the morphology of the organisms. The number of traits…

Answered: 79. | bartleby

Science

Biology

79.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter9: Patterns Of Inheritance

Section: Chapter Questions

Problem 8SQ

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Mutations in DNA that result in altered proteins can causehereditary diseases. Pedigree studies and genetic testing mayclarify the risk of disease. At the chromosome level, nondisjunctionduring meiosis can result in gametes with too few or too manychromosomes, most of which produce inviable offspring.Imprinting refers to inactivation of alleles depending on whichparent the alleles come from; offspring in whom imprinting occursappear haploid for the affected gene even though they are diploid. During spermatogenesis, is there any difference in outcome between first- and second-division nondisjunction?
Genomic imprinting refers to the inheritance of: Question 16 options: Gamete specific DNA methylating marks during meiosis. All epigenetic marks during mitosis. DNA methylating marks during mitosis. All epigenetic marks during meiosis. Gamete specific DNA methylating marks during mitosis.
What aspect of chromosome behavior most clearly accounts for Mendel's law of segregation? Movement of sister chromatids to opposite poles at anaphase Il of meiosis. Movement of homologous chromosomes to opposite poles at anaphase I of meiosis. Crossing over between homologous chromosomes during prophase I of meiosis. Replication of chromosomes prior to meiosis. Independent alignment of different homologous pairs on the metaphase I spindle.
Which of the following statements is true regarding the phenotypic effects of inversions? Select ALL that apply. Heterozygotes are often healthy individuals because these mutations do not impact the dosages of any genes Heterozygotes often exhibit reduced fertility, because translocated and wild-type chromosomes do not separate correctly during meiosis II Homozygotes are often healthy individuals because these mutations do not impact the dosages of any genes Heterozygotes often exhibit reduced fertility, because crossing over between inverted and wild-type chromosomes in Meiosis I results in inviable gametes Heterozygotes often exhibit reduced fertility, because crossing over between inverted and wild-type chromosomes in Meiosis Il results in inviable gametes
Which of the following is false regarding Down Syndrome? O can be caused by a Robertsonian translocation which is the fusion of the q arm of chromosome 21 with the q arm of chromosome O can be caused by a nondisjunction event O can be caused by equal exchange of chromatids during crossing over O Down syndrome individuals could possibly have normal children
A phenotypically normal individual has the following combinations of normal and abnormal chromosomes:The normal chromosomes are shown on the left in each pair.Suggest a series of events (breaks, translocations, crossovers, etc.)that may have produced this combination of chromosomes.
Hi, I'm having some trouble with this practice problem from my study guide. If anyone can explain it it would be very helpful! Sometimes nondisjunction will occur in a parent that has normal chromosome numbers and result in an offspring that has abnormal number of chromosomes. The phenotype of the affected offspring will often allow geneticists to determine in which parent and during which division of meiosis the nondisjunction occurred. In each of the examples below, assume the parents have a normal diploid chromosome complement. EXAMPLE 1: A man with the X-linked dominant condition “brown tooth enamel” and a woman with normal tooth enamel produce a son with brown tooth enamel. Let’s call the allele for brown tooth enamel “XB” and normal tooth enamel “Xb”. In which parent did the nondisjunction occur? Explain and/or illustrate Did nondisjunction occur at meiosis I or II? Explain and/or illustrate. What sex chromosomes are in the child’s somatic cells? EXAMPLE 2: The parents in the…
Hi, I'm having some trouble with this practice problem from my study guide. If anyone can explain it it would be very helpful! Sometimes nondisjunction will occur in a parent that has normal chromosome numbers and result in an offspring that has abnormal number of chromosomes. The phenotype of the affected offspring will often allow geneticists to determine in which parent and during which division of meiosis the nondisjunction occurred. In each of the examples below, assume the parents have a normal diploid chromosome complement. A man with the X-linked dominant condition “brown tooth enamel” and a woman with normal tooth enamel produce a son with brown tooth enamel. Let’s call the allele for brown tooth enamel “XB” and normal tooth enamel “Xb”. EXAMPLE 1: The parents in the family above produce another son, this time with two Y chromosomes and normal tooth enamel. In which parent did the nondisjunction occur? Explain and/or illustrate. Did nondisjunction occur at meiosis I or II?…
Which of the following describes a human cell that contains 47 chromosomes, which includes one pair of autosomes 1-17 and 19-22 and one pair of sex chromosomes. However, 3 copies of chromosome 18 exist. Check all that apply translocation polyploid aneuploid monosomy trisomy euploid inversion
What aspect of chromosome behaviour most clearly accounts for Mendel's law of segregation? Crossing-over between homologous chromosomes during prophase I of meiosis Movement of sister chromatids to opposite poles at anaphase II of meiosis Movement of homologous chromosomes to opposite poles at anaphase I of meiosis Independent alignment of different homologous pairs on the metaphase I spindle Replication of chromosomes prior to meiosis
Which statement about the relationship between genetic map and physical map is FALSE? The correlation between Genetic map distance and Physical map distance is not absolute. Roughly speaking, for two genes on the same chromosome, the bigger their genetic map distance is, the bigger the physical map distance is. The genetic map is in a way a distorted picture of the physical map. 1 genetic map unit (1cM) always correlates with a certain distance on the physical chromosome.
Which of the following describes the difference between genetic maternal effect and cytoplasmic inheritance? O Progeny from a Genetic Maternal Effect cross express the phenotype of their mother's genotype, while progeny from a cytoplasmic inheritance cross share a genotype and phenotype of their mother. Progeny from a Genetic Maternal Effect cross have a phenotype that reflects their own genotype, while progeny from a cytoplasmic inheritance cross share a genotype and phenotype with their mother. Progeny from a Genetic Maternal Effect cross have the same genotype as their mother, while progeny from a Cytoplasmic Inheritance cross do not. There is no difference.