Which parent carries hemophilia

Which parent carries hemophilia

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Both parents carry the X chromosome as a factor. It is mostly a male disorder. ChaCha!

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AP Biology Genetics Test?

Q: Please help, I’m having a hard time with this test!Question 1 (Multiple Choice Worth 2 points)In humans, hemophilia is a sex-linked recessive trait. If a man and woman have a son with hemophilia, which of the following must be true? The father has hemophilia. The mother has hemophilia. The father carries at least one allele for hemophilia. The mother carries at least one allele for hemophilia. Both parents carry at least one allele for hemophilia.Question 2 (Multiple Choice Worth 2 points)Biotechnology is currently being used to effectively do which of the following? Produce vaccines Produce human gene products Diagnose diseases Only Choice 1 and 3 are correct Choices 1, 2, and 3 are correctQuestion 3 (Multiple Choice Worth 2 points)What two enzymes are needed to produce recombinant DNA? Polymerase and ligase Restriction enzyme and ligase Transcriptase and ligase Restriction enzyme and reverse transcriptase Ligase and reverse transcriptaseQuestion 4 (Multiple Choice Worth 2 points)The “central dogma” of molecular genetics is that genetic information is coded in self-replicating DNA and undergoes unidirectional transfer to messenger RNAs in transcription which act as templates for protein synthesis in translation. The exception to part of this statement is: retroviruses tumor viruses plasmids restriction enzymes gene cloningQuestion 5 (Multiple Choice Worth 2 points)In a Mendelian cross between two pea plants that are heterozygous for flower color, what is the probability that the offspring will inherit at least one dominant allele? 1 3/4 2/3 1/2 1/4Question 6 (Multiple Choice Worth 2 points)A couple has two children who both have blue eyes and blonde hair. Both parents are homozygous for blue eyes (bb), but the mother has brown hair (Hh) and the father is a blonde (hh). What is the probability that their next child will have blue eyes and brown hair? 1 1/2 1/4 1/8 1/16Question 7 (Multiple Choice Worth 2 points)Which of the following best describes the parents in a testcross? Both individuals are heterozygous Both individuals are homozygous Both individuals have the recessive phenotype One individual has the dominant phenotype and the other has the recessive phenotype Both individuals have an unknown phenotypeQuestion 8 (Multiple Choice Worth 2 points)Which of the following is true of the Law of Independent Assortment? It states that the alleles at different loci separate independently of each other in a monohybrid cross. It is the reason that the expected ratio in the F2 generation is 9:3:3:1. It states that individuals have 2 alleles for each gene and gametes end up with only one of the two alleles. It states that if an organism has two different alleles for a gene, only one allele has a noticeable effect on the organism’s appearance. More than one of the above answers is correct.Question 9 (Multiple Choice Worth 2 points)A pair of homologous chromosomes often have different lengths often have different alleles often have different genes for different traits are separated into different daughter cells during the process of mitosis would have both been inherited only from the mother or only from the fatherQuestion 10 (Multiple Choice Worth 2 points)Polygenic inheritance is best represented by which of the following? Skin pigmentation in humans ABO blood group in humans White and purple flower color in pea plants Colorblindness in humans Pink petal color in snapdragonsQuestion 11 (Multiple Choice Worth 2 points)In human blood groups, Rh positive is dominant over Rh negative. A woman with A positive blood has a son who is B negative and a daughter who is O positive. Which of the following represents a possible genotype for the mother? IAi rr IAi RR IAIA RR IAIA Rr IAi RrQuestion 12 (Multiple Choice Worth 2 points)Based on the data in the chart below, answer the question that follows. Assume that the wild type parental fly (gray body/normal wings) is heterozygous for the traits, and that the recessive parental fly (ebony body/vestigial wings) is homozygous recessive for the traits. A total of 2000 flies were counted. What could be concluded about these genes? They are sex-linked, and affect only males. They are autosomal on separate chromosomes. They are autosomal but at opposite ends of the same chromosome. They are not affected by crossover events. They are linked on the same chromosome and experienced a crossover event.Question 13 (Multiple Choice Worth 2 points)A student performed a bacterial transformation experiment, and introduced a plasmid into an E.coli suspension that contained a resistance gene to the antibiotic, erythromycin. The student plated the tra

A: Question 1: The mother carries the allele for hemophilia.Question 2: Choices 1, 2, and 3 are correct.Question 3: Restriction enzyme and ligase.Question 4: RetrovirusesQuestion 5: 1/4Question 6: 1/2Question 7: One individual has the dominant phenotype and the other has the recessive phenotypeQuestion 8: It states that the alleles at different loci separate independently of each other in a monohybrid cross. It is the reason that the expected ratio in the F2 generation is 9:3:3:1. It states that if an organism has two different alleles for a gene, only one allele has a noticeable effect on the organism’s appearance.Question 9: Often have different allelesQuestion 10: Skin pigmentation in humansQuestion 11: IAi RrQuestion 12: Can’t see chartQuestion 13: Uncomplete question

Modern Biology I question?

Q: I’m having a little trouble understanding this practice problem:A woman has Turner’s syndrome (only one X chromosome instead of the normal XX genotype). She also has hemophilia, a defect caused by a recessive allele of a gene located on the X chromosome. Her father and mother and phenotypically normal, that is to say neither has the disease state of hemophilia. From which parent did the young woman inherit the chromosome carrying the gene for hemophilia and why?

A: She inherited it from her mother. Her father is normal, meaning that he does not have the allele for hemophilia on his X chromosome. Since the mother is phenotypically normal, she must have been heterozygous; ie, she is a carrier of the hemophilia allele. She passed on the hemophilia allele and, since the woman has Turner syndrome, she does not have X chromosome her father would have given her.Instead of being a carrier (heterozygous), she has hemophilia because she only has one X chromosome, and a “bad” one at that.

Male-patterned baldness, red-green colorblindness and hemophilia are all recessive,?

Q: sex-linked characteristics in humans.a) Based on the information above, identify which chromosome is carrying the sex-linked genes, and explain how you know this. b) Molly was born with hemophilia. Her parents are trying to understand how their daughter has this disease, as this is a disease seen “only in boys.” Help Molly’s parents understand how their daughter inherited this trait by identifying Molly’s genotype, as well as the possible genotypes of her parents that would result in this outcome.

A: a) The X chromosome carries most sex-linked genes, and they are more common in males because males only have one X chromosome. Females have two X chromosomes, so if they receive one “bad” allele (one for color blindness, hemophilia, etc.), they may have a “good” allele to mask over it, so she will be normal phenotypically (but a carrier). On the other hand, if Mom gives Son the recessive allele, he has the disease; he’ll get a Y chromosome from dad, and unfortunately, that can’t save him.b) Since hemophilia is located on the X chromosome, it’s not only in boys. She can get the disease if she’s X^h X^h (homozygous recessive). That would mean that her dad has the disease, (X^h Y) and her mom either has the disease (X^h X^h), or, more likely, since she’s denying that females can get the disease, she’s a heterozygous carrier (X^H X^h).