Which is true regarding X-linked genes? Group of answer choices sons can only inherit them from the mother more common in females the genes are carried on the Y chromosome sons can only inherit them from the father

Which is true regarding X-linked genes? Group of answer choices sons can only inherit them from the mother more common in females the genes are carried on the Y chromosome sons can only inherit them from the father

Name: Which is true regarding X-linked genes?Group of answer choicessons can
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Description: Which is true regarding X-linked genes?Group of answer choicessons can only inherit them from the mothermore common in femalesthe genes are carried on the Y chromosomesons can only inherit them from the father

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter14: Human Inheritance

Section: Chapter Questions

Problem 8SA

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Analysis of X-Linked Dominant and Recessive Traits In the eighteenth century, a young boy with a skin condition known as ichthyosis hystrix gravior was identified. The phenotype of this disorder includes thickening of skin and the formation of loose spines that are sloughed off periodically. This man married and had six sons, all of whom had the same condition. He also had several daughters, all of whom were unaffected. In all succeeding generations, the condition was passed on from father to son. What can you theorize about the location of the gene that causes ichthyosis hystrix gravior?
What is true of an X-linked gene but not of a Y-linked gene? O It does not segregate like other genes during meiosis. O It is present in both male and female offspring. O It is expressed in half of the body cells of males or females. O It is only expressed in female offspring.
Unaffected father Camier mother XY Unaffected Afected Carrier Unaffeded Unaffected daugkter U.S. National Lbrany of Mediche Carrier Affected son daughter son In humans, as well as in many other animals and some plants, the sex of the individual is determined by sex chromosomes. The sex chromosomes are one pair of non-homologous chromosomes: XX represents a female, while XY represents a male. When a gene for a specific trait is attached to the X or Y chromosome, we say it is sex-linked, and when it is attached to the X chromosome, we say it is X-linked. Alleles for these linked traits, such as hemophilia or color blindness, crosses, may be recessive or dominant. Hemophilia is an X-linked, recessive trait. The recessive allele for hemophilia is actually a mutated version of the normal alllele but it can still be passed on through generations. Imagine a female is a carrier for hemophilia; her genotype is Xx She is married to a man who does not have hemophilia. What conclusion is NOT valid…
A family has an X-linked dominant form of congenital generalizedhypertrichosis (excessive hairiness). Although the allele is dominant,males are more severely affected than females. Moreover, the womenin the family often have asymmetrical, hairy patches on their bodies.How does X chromosome inactivation explain this observation?
The X chromosome has a lot of traits for things besides the traits we consider female. It carries traits forthings like the ability of your blood to clot correctly and the ability to see differences in the colors red andgreen. If you blood doesn’t clot correctly, it’s called Hemophilia. If you can’t see the difference betweenred and green, you are colorblind. Therefore, these are referred to as X-Linked or Sex-Linked Traits.Notice that those are on the X chromosome only. That means they are missing from the Y. In fact, the Y iscalled Y because it is physically missing a section at the end. This means the Y chromosome is missing genes that the X chromosome has. If you are XY, you only haveone copy of the gene, or one allele. Given what we just said above, can a XY parent pass a X-Linked Trait to his XY offspring?
You have spent two decades studying a muscular dystrophy disorder. All previous pedigree data indicate this is an X-linked dominant trait, you notice that in one instance the trait skips one daughter coming from an effected father. If this disease is truly X-linked dominant, what is a likely explanation as to why it was not seen in this single female? O Only environmental conditions actually cause the disease O This disease may not be 100% penetrant for the disease O Skipping generations is common for X-linked dominant traits O The definition for X-linked dominant no longer means what it did when this disease was first discovered O This disease must not actually be X-linked dominant
Can someone explain this? When you cross female flies with white eyes to male flies with red eyes, you have all F1 progeny with red eyes (including both females and males) Isn't eye colour in flies are x-linked? how come all f1 offspring males and females are produced with red eyes? thanks
If X inactivation in humans shuts down extra X chromosomes, why do XXY and XXX individuals display abnormal phenotypes? Group of answer choices Some X linked genes escape inactivation In trisomies, all the X chromosomes are shut down X inactivation can only shut down one X per cell The extra Barr body (condensed X) takes up physical space in the cell
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele?
Human females have two X chromosomes XX; males have one X and one Y chromosome XY. a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. A female homozygous for an X-linked allele can produce how many types of gametes with respect to that allele? c. A female heterozygous for an X-linked allele can produce how many types of gametes with respect to that allele?
Analysis of X-Linked Dominant and Recessive Traits The following is a pedigree for a common genetic trait. Analyze the pedigree to determine whether the trait is inherited as: a. autosomal dominant b. autosomal recessive c. X-linked dominant d. X-linked recessive e. Y-linked
Equalizing the Expression of X Chromosome Genes in Males and Females How many Barr bodies would the following individuals have? a. normal male b. normal female c. Klinefelter male d. Turner female