Consider this carefully and explain reasoning. If you are a male, your X chromosome has most likely been derived from: your maternal grandfather only your paternal or maternal grandfathers your maternal grandfather or grandmother your paternal grandfather only
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Consider this carefully and explain reasoning. If you are a male, your X chromosome has most likely been derived from:
your maternal grandfather only
your paternal or maternal grandfathers
your maternal grandfather or grandmother
your paternal grandfather only
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- The inactivation of one of the X chromosomes forms a structure known as a(n): telomere centromere autosome Barr body A man who carries a dominant X-linked trait will pass this trait on to: all of his sons all of his daughters half of his daughters and half of his sons half of his daughters An individual possessing two copies of the same sex chromosomes is known as: Question 3 options: heterogametic homozygous diploid homogameticThe 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?X-linked lissencephaly is an X-link dominant trait pertaining to a brain disorder. It superficially resembles an autosomal dominant trait because both the daughters and sons of an affected female parent can be affected. Mr. Panganiban is affected by the said disorder while his wife is not. Using your knowledge in predicting the genetic possibilities of the offspring, what do you think would happen to their sons and daughters in the first filial generation? Females affected by an X-link dominant have 50% for their sons and daughters to be affected. Father affected by the X-linked dominant trait can transmit the trait to all his daughters. Males with lissencephaly could transmit the genetic disorder for both sons and daughters. Lissencephaly is an X-link limited dominant trait. It usually affects males because they have only a single chromosome.
- Shown above is a family pedigree tree in which family members afflictedwith the disease Haemophilia are shown with filled-in squares (male) or circles (females). A couple is trying to determine the likelihood of passingon the disease to their future children (represented by the ? symbolabove) because the hemophilia runs in the woman’s family. Turner syndrome is a disease in which an individual is bornwith only a single X chromosome. Suppose the woman in thecouple is a carrier for hemophilia and has a child with Turnersyndrome. Would this child have the disease?In this part, you will work out on X-linked traits. Remember that males have only one X chromosome and females have two. For X-linked recessive, use the following designations: XA= normal Xa= the trait (a genetic disease or abnormality) For X-linked dominant, use the following designations: XA= the trait (a genetic disease or abnormality) Xa= normal Determine if the pedigrees below can be for a trait that is X-linked recessive. Write the genotype next to the symbol for each person in the pedigree below. A. Is it possible that this pedigree is for an X-linked recessive trait? B. What can you conclude about the children of mothers affected with an X-linked recessive characteristic? C. What can you conclude about the father of an affected female?How many total chromosomes were on your karyotype sheets? How many of the chromosomes are autosomes? Is this child a male or a female? How do you know? Does this child appear to have a genetic disorder? If so, what genetic disorder does this child have? ( DID I DO THIS CORRECTLY I THINK ITS ) 1. 47 CHROMOSOMES 2. 44 ARE AUTOSOMES 3. MALE HAS A Y CHROMOSOME 4. YES, HAS EXTRA Y CHROMOSOME AND THE GENETIC DISORDER IS XYY SYNDROME
- Men have XY (or YX) chromosomes and women have XX chromosomes. X-linked recessive genetic diseases (such as juvenile retinoschisis) occur when there is a defective X chromosome that occurs without a paired X chromosome that is not defective. Represent a defective X chromosome with lowercase x, so a child with the xY or Yx pair of chromosomes will have the disease and a child with XX or XY or YX or xX or Xx will not have the disease. Each parent contributes one of the chromosomes to the child. Complete parts a through d below. a. If a father has the defective x chromosome and the mother has good XX chromosomes, what is the probability that a son will inherit the disease? nothing (Type an integer or a decimal. Do not round.) b. If a father has the defective x chromosome and the mother has good XX chromosomes, what is the probability that a daughter will inherit the disease? nothing (Type an integer or a decimal. Do not round.) c. If a mother has one defective x…A phenotypically normal individual has the following combinations of normal and abnormal chromosomes:The normal chromosomes are shown on the left in each pair.Suggest a series of events (breaks, translocations, crossovers, etc.)that may have produced this combination of chromosomes.A woman who sought genetic counseling is found to be heterozygousfor a chromosomal rearrangement between the second andthird chromosomes. Her chromosomes, compared to those in anormal karyotype, are diagrammed on the next page:(a) What kind of chromosomal aberration is shown?
- 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?Your friend is convinced his calico cat is male. He takes the cat to the vet. Sure enough the cat is male but has a calico coat and is possibly infertile. How do you explain? Group of answer choices He is wrong, it's impossible to have a male calico cat The cat has three X chromosomes but no Y chromosome The cat has Kleinfelter's syndrome (XXY) and his two X's have different color alleles The cat is XYY and the two Y chromosomes are both expressedA company that offers PGD terms an embryo “normal and healthy” if it has 46 chromosomes. Why is this statement misleading? , Two famous male actors had twins using a surrogate mother who carried two embryos that hadbeen fertilized in vitro, one with one man’s sperm and the other with the other man’s sperm. In terms of genetics, how closely are the babies, a boy and a girl, related to each other if they have different fathers?