A system of sex determination known as haplodiploidy is found in honeybees. Females are diploid, andmales (drones) are haploid. Male offspring resultfrom the development of unfertilized eggs. Sperm areproduced by mitosis in males and fertilize eggs in thefemales. Ivory eye is a recessive characteristic inhoneybees; wild-type eyes are brown.a. What progeny would result from an ivory-eyedqueen and a brown-eyed drone? Give both genotype and phenotype for progeny produced fromfertilized and nonfertilized eggs.b. What would result from crossing a daughter fromthe mating in part (a) with a brown-eyed drone?

A system of sex determination known as haplodiploidy is found in honeybees. Females are diploid, andmales (drones) are haploid. Male offspring resultfrom the development of unfertilized eggs. Sperm areproduced by mitosis in males and fertilize eggs in thefemales. Ivory eye is a recessive characteristic inhoneybees; wild-type eyes are brown.a. What progeny would result from an ivory-eyedqueen and a brown-eyed drone? Give both genotype and phenotype for progeny produced fromfertilized and nonfertilized eggs.b. What would result from crossing a daughter fromthe mating in part (a) with a brown-eyed drone?

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter13: Patterns In Inherited Traits

Section: Chapter Questions

Problem 2GP: Assuming that independent assortment occurs during meiosis, what type(s) of gametes will form in...

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Honeybees are unusual in that male bees (drones) have only onecopy of each gene, but female bees have two copies of their genes.This difference arises because drones develop from eggs that havenot been fertilized by sperm cells. In bees, the trait of long wingsis dominant over short wings, and the trait of black eyes is dominant over white eyes. If a drone with short wings and black eyeswas mated to a queen bee that is heterozygous for both genes, what are the predicted genotypes and phenotypes of male and femaleoffspring? What are the phenotypic ratios if we assume an equalnumber of male and female offspring?
Ectrodactyly, also known as “lobster claw syndrome,” is a recessivedisorder in humans. If a phenotypically unaffected couple producesan affected offspring, what are the following probabilities?A. Both parents are heterozygotes.B. An offspring is a heterozygote.C. The next three offspring will be phenotypically unaffected.D. Any two out of the next three offspring will be phenotypicallyunaffected
Suppose that a gene affects the anterior morphology in house flies andis inherited as a maternal effect gene. The gene exists in a functionalallele, H, and a recessive nonfunctional allele, h, which causes a smallhead. A female fly with a normal head is mated to a true-breedingmale with a small head. All of the offspring have small heads. Whatare the genotypes of the mother and offspring? Explain your answer
Piebald spotting is a condition found in humans inwhich there are patches of skin that lack pigmentation. The condition results from the inability ofpigment-producing cells to migrate properly duringdevelopment. Two adults with piebald spotting haveone child who has this trait and a second child withnormal skin pigmentation.a. Is the piebald spotting trait dominant or recessive?What information led you to this answer?b. What are the genotypes of the parents?
The plant blue-eyed Mary grows on Vancouver Islandand on the lower mainland of British Columbia. Thepopulations are dimorphic for purple blotches on theleaves—some plants have blotches and others don’t. NearNanaimo, one plant in nature had blotched leaves. Thisplant, which had not yet flowered, was dug up and takento a laboratory, where it was allowed to self. Seeds werecollected and grown into progeny. One randomly selected (but typical) leaf from each of the progeny is shown inthe accompanying illustration.a. Formulate a concise genetic hypothesis to explainthese results. Explain all symbols and show all genotypicclasses (and the genotype of the original plant).
In individuals affected by cystic fibrosis, salt crystals may appear afterperspiration dries up. In addition, the disease causes respiratory disorderswhich can be both debilitating and lethal. It occurs in individuals homozygousfor recessive gene. If 2 normal parents had a daughter with the symptoms ofthis disease, and a normal son, what is the probability that he might be acarrier of the recessive gene?Express answer in fraction form.
Assuming that independent assortment occurs during meiosis, what type(s) of gametes will form in individuals with the following genotypes? a. AABB b. AaBB c. Aabb d. AaBb
Independent 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.
Table shows that Turner syndrome occurs when an individualinherits one X chromosome but lacks a second sex chromosome.Can Turner syndrome be due to nondisjunction duringoogenesis, spermatogenesis, or both? If a phenotypically normalcouple has a color-blind child (due to a recessive X-linkedallele) with Turner syndrome, did nondisjunction occur duringoogenesis or spermatogenesis in this child’s parents? Explainyour answer.
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