Vhich statement best explains why so many variations in coat colors exist? O Each coat color is the result of mutations that take place after the horse is born. The recombination of genes during meiosis results in offspring that exhibit a variety of coat colors. O Varying gene expression after fertilization leads to a variety of coat colors. O Recombination during mitosis leads to the expression of different coat colors as the horse develops.

Vhich statement best explains why so many variations in coat colors exist? O Each coat color is the result of mutations that take place after the horse is born. The recombination of genes during meiosis results in offspring that exhibit a variety of coat colors. O Varying gene expression after fertilization leads to a variety of coat colors. O Recombination during mitosis leads to the expression of different coat colors as the horse develops.

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter10: Control Of Gene Expression

Section: Chapter Questions

Problem 3CT: Almost all calico cats (one is pictured in FIGURE 10.7B) are female. Why? B When this calico cat was...

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Almost all calico cats (one is pictured in FIGURE 10.7B) are female. Why? B When this calico cat was an embryo, one of the two X chromosomes was inactivated in each of her cells. The descendants of the cells formed her adult body, which is a mosaic for expression of X chromosome genes. Black fur arises in patches where genes on the X chromosome inherited from one parent are expressed; orange fur arises in patches where genes on the X chromosome inherited from the other parent are expressed. FIGURE 10.7 Animated X chromosome inactivation.
This diagram shows a parental cell going through mitosis and producing 2 daughter cells. Which cells in th- mutation.) D |G H) D and G are genetically identical, but H is genetically different. O D and H are genetically identical, but G is genetically different. O Gand H are genetically identical, but D is genetically different. O All of the cells - D, G, and H - are genetically identical. O None of the cells in the diagram are genetically identical. All the cells - D, G, and H- are genetically different from each otl
The maternal-effect mutation bicoid (bcd) is recessive. Inthe absence of the bicoid protein product, embryogenesis isnot completed. Consider a cross between a female heterozygousfor the bicoid mutation (bcd+/ bcd-) and a homozygousmale(bcd-/ bcd-). Predict the outcome (normal vs. failed embryogenesis) inthe F1 and F2 generations of the cross described.
. The normal eye color of Drosophila is red, but strains inwhich all flies have brown eyes are available. Similarly,wings are normally long, but there are strains with shortwings. A female from a pure line with brown eyes andshort wings is crossed with a male from a normal pureline. The F1 consists of normal females and short-wingedmales. An F2 is then produced by intercrossing the F1.Both sexes of F2 flies show phenotypes as follows:38 red eyes, long wings38 red eyes, short wings18 brown eyes, long wings18 brown eyes, short wingsDeduce the inheritance of these phenotypes; useclearly defined genetic symbols of your own invention.State the genotypes of all three generations and thegenotypic proportions of the F1 and F2.Unpacking Problem 31Before attempting a solution to this problem, try answering thefollowing questions:1. What does the word normal mean in this problem?2. The words line and strain are used in this problem.What do they mean, and are they interchangeable?3. Draw a simple…
. A mature female wolf, with 78 diploid chromosomes in each somatic cell, produces haploid oocytes (egg cells) containing how many chromosomes per cell? 1 sex-determining chromosome (Y) and 38 autosomes 2 sex-determining chromosomes (XX) and 76 autosomes 1 sex-determining chromosome (X) and 39 autosomes 2 sex-determining chromosomes (XY) and 76 autosomes 1 sex-determining chromosome (X) and 38 autosomes
Only some cells derive from a mitosis event.. 1. Which statement is most correct regarding the difference between mitosis and meiosis? O Meiosis can produce any cell type, while mitosis can only make gametes (sperm/egg cells) * Mitosis essentially clones a cell (makes an identical copy), while meioisis is a ma O complex process that divides up a cell's set of chromosomes into gametes (sperm/egg cells) ODNA replication is required for mitosis but not for meiosis ODyads are seen in mitosis but not meiosis 2 What distinguichon hon
Paris has her mother's brown hair and her father's blue eyes. Paris inherited these traits from her parents. The information for traits such as hair and eye color are stored in the-- chromosomes located within the genes O cytoplasm located inside the gene O genes located within the chromosomes O nucleus inside the genes
. An allotetraploid species has a genome composed oftwo ancestral genomes, A and B, each of which havea basic chromosome number (x) of seven. In thisspecies, the two copies of each chromosome of eachancestral genome pair only with each other duringmeiosis. Resistance to a pathogen that attacks the foliage of the plant is controlled by a dominant allele atthe F locus. The recessive alleles Faand Fbconfersensitivity to the pathogen, but the dominant resistancealleles present in the two genomes have slightly different effects. Plants with at least one FAallele areresistant to races 1 and 2 of the pathogen regardlessof the genotype in the B genome, and plants with atleast one FBallele are resistant to races 1 and 3 of thepathogen regardless of the genotype in the A genome.What proportion of the self-progeny of an FA Fa FB Fbplant will be resistant to all three races of the pathogen?
During mitosis, organelles with different genotypes can end up in different cells within a single individual. What is one possible outcome of this random segregation of organelles during cell division? O dominant gain-of-function mutations dominant loss-of-function mutations O incomplete penetrance Ochromosomal duplication mutations O chromosomal deletion mutations
A female fruit fly has one normal X chromosome and one X chromosomewith a deletion. The deletion occurred in the middle ofthe X chromosome and removed about 10% of the entire length ofthe X chromosome. Suppose you stained and observed the chromosomesin salivary gland cells of this female fruit fly. Draw thepolytene arm of the X chromosome. Explain your drawing.
16. Genetic Variation can occur when homologous chromosomes cross over. What occurs during this process that leads to the genetic variation? (LS3-2) * Corresponding segments of DNA from non-sister chromatids are exchanged. O Two chromatids get tangled, resulting in one re-sequencing its DNA. Two sister chromatids exchange identical pieces of DNA. O Maternal alleles are "corrected" to be like paternal alleles and vice versa.
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