Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 14, Problem 12SQ
Summary Introduction
Introduction: During sexual reproduction, meiosis is a process of cell division where chromosome number is reduced to half. Its purpose is the formation of gametes. The homologous chromosomes randomly align with their homologs at metaphase I. The chromosomes are randomly paired and segregated to opposite poles.
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Students have asked these similar questions
Crossing over....
a. leads to the exchange of material between homologous chromosomes in meiosis.
b. requires the pairing of homologous chromosomes in prophase of meiosis I.
c. happens less frequently between genes that are far apart on a chromosome than between genes that are close together.
d. a and b, but not c
e. a, b, and c
Mendel's pea plants were a good choice for studying heredity, because:
a) They have lots of easily observable traits that vary in an either-or manner.
b) Their mating is uncontrollable.
c) There are separate male and female plants.
d) The plants are incapable of cross-pollination.
Crossing over means the same as:
a.
incomplete dominance
b.
the process by which pieces of homologous chromosomes are exchanged
c.
heterozygosity
d.
the peculiar lineup of homologous chromosomes
e.
independent assortment
Chapter 14 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 14 - Constructing a pedigree is particularly useful...Ch. 14 - Prob. 2SQCh. 14 - Prob. 3SQCh. 14 - Prob. 4SQCh. 14 - Prob. 5SQCh. 14 - A trait that is present in a male child but not in...Ch. 14 - Color blindness is a case of ______ inheritance....Ch. 14 - A female child inherits one X chromosome from her...Ch. 14 - Prob. 1DAACh. 14 - Prob. 2DAA
Ch. 14 - Prob. 3DAACh. 14 - Prob. 9SQCh. 14 - Expression of the SRY gene on the Y chromosome...Ch. 14 - Prob. 11SQCh. 14 - Prob. 12SQCh. 14 - Prob. 13SQCh. 14 - Prob. 14SQCh. 14 - Match the chromosome terms appropriately. ____...Ch. 14 - Prob. 1GPCh. 14 - Does the phenotype indicated by the red circles...Ch. 14 - Human females have two X chromosomes (XX); males...Ch. 14 - A mutated allele responsible for Marfan syndrome...Ch. 14 - The somatic cells of most individuals with Down...Ch. 14 - Mutations in the genes for clotting factor VIII...
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- Alternative forms of the same gene are called _________ . a. gametes c. alleles b. homologous d. sister chromatidsarrow_forwardIn a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what is the expected outcome? a. all white-eyed male offspring b. all white-eyed female offspring c. all red-eyed offspring d. half white-eyed make offspringarrow_forwardNondisjunction in meiosis can result in_____ . a. base-pair substitutions c. crossing over b. aneuploidy d. pleiotropyarrow_forward
- What is it called when chromosomes fail to separate properly during meiosis? A. Nondisjunction B. Karyotype C. Chromosomal separation failure D. Inappropriate separation E. Karyokinesisarrow_forwardLocus heterogeneity means that a genetic disordera. 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 parentsarrow_forwardColor blindness in men is controlled by a recessive gene located on the X chromosome. Can a brother and sister with color blindness have another normal brother? A. Yes, if the mother is a carrier. B.Yes, if the mother is homozygous. C.Yes, if the father is heterogametic. D.Yes, if the father is a carrier.arrow_forward
- Polydactyly is a condition in which a person has extra fingersand/or toes. It is caused by a dominant allele. If a person carriesthis allele but does not have any extra fingers or toes, this is anexample ofa. haploinsufficiency.b. a dominant negative mutation.c. incomplete penetrance.d. a gain-of-function mutation.arrow_forwardA man and his wife are both heterozygous for brown eyes. They have ix children all of whom have blue eyes? A) How is it explained? B) What are the chances that their next child will have brown eyes? C) What are the chances that their next child will have blue eyes.arrow_forwardIn diseases with a recessive inheritance linked to sex (X chromosome), from the mother: A. 50% of women and 50% of men are affected. B. The woman is always affected by the disease. C. The man is always affected by the disease. D. 50% of women are affected.arrow_forward
- What went wrong during meiosis of the parent cell on the left? a) nondisjunction during meiosis I b) nothing went wrong c) nondisjunction during meiosis II d) monosomy during meiosis II e) trisomy during meiosis Iarrow_forwardIndependent assortment means thata. two genes tend to be inherited together.b. which allele of a gene is included in a gamete has noeffect on which allele of a second gene is included in thesame gamete.c. which allele of a gene is included in a gametedetermines which allele of a second gene is included inthe same gamete.d. homologous chromosomes do not separate during meiosis.arrow_forwardA plant that is homozygous for the recessive yellow pod color is crossed with a plant that is heterozygous. Which phenotype will appear MOST in the offspring? A. There will only be plants with green pods. B. There will be more plants with green pods. C. There will be more plants with yellow pods. D. Plants with yellow and green pods will appear in equal numbers.arrow_forward
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