BIOLOGY
5th Edition
ISBN: 9781264104680
Author: BROOKER
Publisher: MCG
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Chapter 18, Problem 4TY
Summary Introduction
Introduction: Genomic imprinting refers to the process where a particular segment of DNA gets marked and that marked DNA is retained throughout the lifespan of an individual. It helps to distinguish the gene copy that is inherited from the male parent and gene copy that is inherited from the female parent.
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When the phenotype of the offspring is determined by endoparasites in the father it is…
a.
epistasis
b.
due to genes located in the mitochondria.
c.
a maternal effect
d.
non-nuclear inheritance
e.
a non-additive genetic effect
In an embryo from a homozygous Bicoid mutant female,which class(es) of gene expression is (are) abnormal?a. Gap genesb. Pair-rule genesc. Segment-polarity genesd. Hox genes
In genetic maternal effect, the phenotype of the individual is determined by which of these statements?
A. The sex of the parent who transmits the gene
B. The nuclear genotype of the maternal parent
C. The sex of the individual with only one sex able to express the phenotype
D. Cytoplasmic genes usually located in the mitochondria
E. A combination of environmental factors and the genotype of the individual
Chapter 18 Solutions
BIOLOGY
Ch. 18.2 - Prob. 1CCCh. 18.3 - Prob. 1CCCh. 18.3 - Prob. 1CSCh. 18.5 - Prob. 1CSCh. 18.5 - Prob. 1CCCh. 18.6 - Prob. 1EQCh. 18.6 - Prob. 2EQCh. 18.6 - Prob. 3EQCh. 18.6 - Prob. 1CCCh. 18.6 - Prob. 2CC
Ch. 18 - Which of the following is an example of an...Ch. 18 - Prob. 2TYCh. 18 - A female mouse that is Igf2 Igf2 is crossed to a...Ch. 18 - Prob. 4TYCh. 18 - Prob. 5TYCh. 18 - Prob. 6TYCh. 18 - Prob. 7TYCh. 18 - Prob. 8TYCh. 18 - Based on the ideas proposed by Morgan, which of...Ch. 18 - Extranuclear inheritance occurs because a. certain...Ch. 18 - Define epigenetics. Are all epigenetic changes...Ch. 18 - What is a Barr body? How is its structure...Ch. 18 - Core Concept: Information A core concept of...Ch. 18 - Prob. 1COQCh. 18 - Mendel studied seven traits in garden pea plants,...
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- Fruit fly segmentation begins during oogenesis and is affected by which maternal genes? (Note answers can be multiple or if not given from the option, provided the proper answer) a. Gap genes b. Oskar genes c. Pair-rule genes d. Gurken genesarrow_forwardWhich of the following is a FALSE statement? A) An individual with two X chromosomes and one Y chromosome has testes. B. The human female determines the sex of her offspring. (C) Genomic imprinting allows for differential expressions of an allele. D. Epigenetic changes can be passed on to a zygote. Deletion of the SRY gene would cause male fetuses to develop as females.arrow_forwardWhen a gene is inactivated during gamete formation and thatgene is maintained in an inactivated state in the somatic cells ofoffspring, such an inheritance pattern is calleda. linkage.b. X-chromosome inactivation.c. epistasis.d. genomic imprinting.e. polygenic inheritance.arrow_forward
- It is estimated that in about 1/150,000 births, an individual is born with 46 chromosomes, both an X and a Y chromosome, but is externally a phenotypic female at birth. A mutation in the gene for which protein is the most likely explanation for this condition? A. Chorionic gonadotropin B. Anti-Müllerian hormone receptor C. Testes determining factor D. Wolffian regression factor (WRF) E. Estrogen receptor βarrow_forwardThe process of mitotic recombination involves the a. exchange of chromosomal regions between homologsduring gamete formation.b. exchange of chromosomal regions between homologsduring the division of somatic cells.c. reassortment of alleles that occurs at fertilization.d. reassortment of alleles that occurs during gameteformation.arrow_forwardOne of the forms of rickets is inherited in the autosomal dominant way. This disease is a result of: Select one: a. Aneuploidy. O b. Changes in the number of chromosomes. c. Chromosomal mutations. e. Gene mutations. O d. Polyploidy.arrow_forward
- Virtually all steps of embryological development depend on: a. Alterations in the genome b. Tumor Stem Cells c. Changes in programs of gene expression d. Telomerasearrow_forwardIf a Drosophila larva is missing much of its posterior end it is likely due to a mutation che: A. maternal bicoid gene. B. zygotic bicoid gene. C. maternal nanos gene. D. zygotic nanos gene.arrow_forwardLocus heterogeneity refers to a genetic disorder thata. has a heterogeneous phenotype.b. is caused by mutations in two or more different genes.c. involves a structural change in multiple chromosomes.d. is inherited from both parents.arrow_forward
- Which of the following statements regarding the Y chromosome in mammals is TRUE?A. The Y chromosome is less than half the size of the X chromosome.B.Y chromosomes are most often present in egg cells and are not found in sperm cells. C.Most female mammals have one Y chromosome. D. The Y chromosome contains no protein-coding genes.arrow_forwardWhich of the following statements is/are true? A. Spermatogenesis is an example of asymmetric cell division. B. The formation of a mature egg occurs through symmetric cell division. C. Spermatogenesis and oogenesis are both examples of asymmetric cell division. D. Spermatogenesis involves only symmetric cell division whereas oogenesis involves asymmetric cell division.arrow_forwardHumans with aneuploidy who survive usually have incorrect numbersof chromosome 13, 18, or 21 or the sex chromosomes. A possibleexplanation why these abnormalities permit survival is becausea. the chromosomes have clusters of genes that aid in embryonicgrowth.b. the chromosomes are small and carry relatively few genes.c. of X-chromosome inactivation.d. of both b and c.arrow_forward
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