Concept explainers
To explain: The individual which shows heterogametic sex.
Introduction: The mechanism of sex determination differs from one species to another. Secondary sexual characteristic of an individual helps in the determination of its sex. Various environmental factors are responsible for the determination of sex as interaction between the environment and genes provides the criteria in the production of male and female.
To explain: The alien sex (female or male) is heterogametic.
Introduction: The mechanism of sex determination differs from one species to another. Secondary sexual characteristic of an individual helps in the determination of its sex. Various environmental factors are responsible for the determination of sex as the interaction between the environment and genes provides the criteria in the production of male and female.
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Chapter 7 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
- Why Sexual is the most important type of variation in human?arrow_forwardwhat is Sex-Linked and Sexually Dimorphic Traitsin Humans?arrow_forwardFrom your research, you discover that in this species of fish, the allele for black color is dominant to orange color. Based on this research, can you determine the genotype of a black fish just by looking at it? Why or why not? Yes, because the recessive allele must have been eliminated by the dominant one. Yes, because the phenotype always expresses all the alleles. No, because you do not know the DNA sequence. No, because it could be either homozygous dominant or heterozygous.arrow_forward
- How does the chemical structure of the carbon atom account for the differences between the male and female lions seen in the photo? Do all the animals produce chemicals that help in expressing the sex differentiating characteristics?arrow_forwardWhat determines whether a gamete is male or female? Explain why this difference predicts the two main forms of sexual selection.arrow_forwardWhat are the Equality in the Sexes in Human Evolution? Why is this important to learn?arrow_forward
- About 40% of Solomon Islanders carry a gene for blond hair, and yet only 5%–10% of these people actually have blond hair. Why is the number of people with blond hair only 5%–10% when so many people carry genes for blond hair? The duck-billed platypus has a unique mechanism of sex determination: females have five pairs of X chromosomes (X1X1X2X2X3X3X4X4X5X5) and males have five pairs of X and Y chromosomes (X1Y1X2Y2X3Y3X4Y4X5Y5). Do you think each of the X and Y chromosome pairs in males assort independently of other X and Y pairs during meiosis? Why or why not? How is the inheritance of X-linked traits different from the inheritance of autosomal traits? How is the inheritance of X-linked and autosomal traits similar? List as many differences and similarities as you can.arrow_forwardIn fruit flies, red-eyes are dominant to white-eyes. In addition, eye color is a sex-linked trait. A red-eyed male Drosophila mates with a red-eyed female Drosophila. One of the female's parents had white eyes. What proportion of the male offspring will have white eyes? Check if my answer is correctarrow_forwardDescribe genetic linkage. What is the role of location on a particular chromosome in determining if two traits are linked? Describe the role that blood antibodies play in determining which blood types can be transfused into a particular patient. Use several examples to support your assertions. Sex determination is different in birds and mammals. Describe how this difference in sex determination leads to the different probability of inheriting a sex-linked trait in male and female mammals versus birds.arrow_forward
- Sex determination is different in birds and mammals. Describe how this difference in sex determination leads to a different probability of inheriting a sex-linked trait in male and female mammals versus birds.arrow_forwardIn a certain breed of dogs, a gene (L) codes for hair length. The dominant trait is short hair and the recessive is long hair. Suppose a heterozygous female dog and a homozygous recessive male dog mate. What is the male dog’s genotype and the female dog’s genotype? What is the male dog’s phenotype and the female dog’s phenotype? What will be the genotypic ratio for the offspring from these dogs? What will be the phenotypic ratio for the offspring from these dogs?arrow_forwardWhy are monozygotic twins genetically identical, whereas dizygotic twins share only 50% of their genes on average?a. Monozygotic twins tend to look more similar.b. Monozygotic twins develop from two different eggs fertilized by the same sperm, whereas dizygotic twins develop from two eggs fertilized by two different sperm.c. Monozygotic twins develop from a single egg fertilized by one sperm, whereas dizygotic twins develop from a single egg fertilized by two different sperm.d. Monozygotic twins develop from a single egg fertilized by a single sperm, whereas dizygotic twins develop from two eggs fertilized by two different sperm.arrow_forward
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning