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Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: ZOË95 on May 14, 2013 11) The sperm chromosome maps are more likely to be DeP than DEP. Explain. (Thumbnail #1)
Hint - Again the location of the alleles on the chromosome is important. The farther apart, and the greater the distance from the centromere, then the higher the cross-over rate. 12) A Drosophila with white eye colour was crossed with a Drosophila with apricot eye colour: 50% of the offspring had apricot eye colour and 50% had honey eye colour. The genotypes of the parents were E4E4 and (Thumbnail #2) A) E1E4 B) E2E4 C) E2E3 D) E2E2 Hint - Wild type: E1E1, E1E2, E1E3, E1E4 Apricot: E2E2, E2E3, E2E4 Honey: E3E3, E3E4 White: E4E4 see (sr) Genetics 7 > means dominant over 13) Thumbnail #3 | A cross of a wild-type fly carrying the allele for white and a wild-type fly carrying the alleles for apricot produces offspring with the ratio of A) 1 wild type: 1 apricot: 1 honey: 1 white B) 9 wild type: 3 apricot: 3 honey: 1 white C) 2 wild type: 1 apricot: 1 honey: 0 white D) 3 wild type: 1 apricot: 0 honey: 0 white Hint for Question 13 Wild type: E1E1, E1E2, E1E3, E1E4 Apricot: E2E2, E2E3, E2E4 Honey: E3E3, E3E4 White: E4E4 see (sr) Genetics 7 14) Consider the following hypothetical case: in some birds, a dominant gene is lethal. When a homozygous dominant gene is lethal, a heterozygous condition results in short and crooked wings, and a bird that is homozygous reccessive is normal in wing structure. What is the phenotype ratio if two heterozygous short and crooked-wing birds were crossed? A) 1: 2 : 1 B) 3: 1 C) 1: 1 D) 2: 1 Hint for Question 14 WW, homozygous dominant is lethal resulting in dead birds. Ww represents short and crooked wings, and ww is the genotype of normal birds. (THUMBNAIL #4) 15) Another example of lethality occurs when homozygous recessive is lethal. If nn is lethal in an organism, how many of a population of 120 have the lethal genotype when two heterozygous individuals are crossed? A) 25 B) none C) 30 D) 65 Hint for Question 15 nn (lethal) appears in the lower right box in the Punnett square. INFO - This is to be remembered when combined with other traits. For example to have blue eyes (1/4) and be a girl, the probability is 1/4 X 1/2 = ___. (Fundamental Counting Principle) 16) Sex determination in humans is a chance event. A family consisted of nine boys, including two sets of twin boys. Each pair of twins made a pitcher-catcher combination on a baseball team. The family would like to have a daughter. What is the chance that their tenth child will be a girl ? (THUMBNAIL #5) A) 25% B) 50% C) (1/2)10 D) 10% 17) What chance would a family have of getting three boys in a row? A) 3/4 B) 1/2 C) 1/8 D) 1/4 Hint for Question 17 Any one of these children will not have any impact on the sex of either of the other two. They are independent events. 18) Hypophosphatemia is an X-linked dominant disorder that causes a type of rickets. Which statement about people with this disorder is likely true? A) Affected males produce all affected daughters and no affected sons. B) Affected heterozygous females transmit the trait to all their sons. C) Affected heterozygous females transmit the trait to all their daughters. D) Affected males produce all affected sons and no affected daughters. Hint for Question 18 Complete a Punnett square for each alternative to see which is a true statement. Logic word is ______ ? Correct: dominant inheritance, not recessive. This changes everything in the Punnett squares. 19) The colour of eyes in fruit flies is determined by a gene on the X chromosome with two alleles. XR = red eyes; Xr = white eyes Cross a red eye male to a white eye female. Show the genotypes and phenotypes, including the sex, of the parents and offspring. 21) Two different genes control the expression of coat colour in an organism. The allele B produces a black coat colour and the allele G produces a gray-striped coat. The gene B influences the expression of gene G. The gray-stripped coat pattern appears only when gene B is homozygous recessive. An albino (coat colour lacking) occurs when both genes are homozygous A pure-breeding black coated organism was mated with an albino organism; all offspring had black coats. The genotypes of the parents of these F1 offspring could be A) bbGG x BBgg B) BbGG x bbgg C) Bbgg x bbGG D) BBGG x bbgg Hint for Question 21 Form parents of the different types of parents. What might a black be ______ ? What might the genotype of a gray be _____ ? What is the genotype of an albino _____ ? 22) Two different genes control the expression of coat colour in an organism. The allele B produces a black coat colour and the allele G produces a gray-stripped coat. The gene B influences the expression of gene G. The gray-stripped coat pattern appears only when gene B is homozygous recessive. An albino (coat colour lacking) occurs when both genes are homozygous A pure-breeding black coated organism was mated with an albino organism; all offspring had black coats. Organisms of the F1 generation are suspected of being heterozygous for both genes. A test cross of albino organisms with the heterozygous organisms should produce a phenotypic ratio in the offspring of A) 3 : 1 B) 1 : 0 C) 1 : 1 : 1 : 1 D) 2 : 1 : 1 Hint for Question 22 BG Bg bG bg bg BbGg Bbgg bbGg bbgg colour? colour?colour? colour? Proceed carefully. 23) Numerical Response What is the probability of albino offspring being produced from the test cross in the previous question? (Record your answer as a value from 0 to 1, rounded to two decimal places.) Hint for Question 23 Did you position a 0 before the decimal? 27) If two Labrador retrievers with the genotype BbEe were to be crossed, what phenotypic ratio would be expected in their offspring? (THUMBNAIL #6) Answer: _____: _____: ______ Black Brown Golden Yellow 30) The answer that provides correct information about the genotypes for individuals I-1, II-1, and II-4 is (THUMBNAIL 7) A) I-1 is IAi; II-1 is IAIA or IAi or IAIB or IBi; II-4 is IAi B) I-1 is IAIA; II-1 is IAIA or IAi or IBIB or IBi ; II-4 is ii C) I-1 is IAi; II-1 is IAIA or IAi; II-4 is ii D) I-1 is IAIA; II-1 is IAIA or IAi; II-4 is IAi 31) Assume that individual II-4 has blood type A. The probability of individuals II-2 and III-3 having type O blood, respectively, is (Thumbnail 8) A) II-2 is 0.00 and III-3 is 0.00 B) II-2 is 0.00 and III-3 is 0.25 C) II-2 is 0.25 and III-3 is 0.25 D) II-2 is 0.25 and III-3 is 0.00 32) THUMBNAIL 9 | Which of the above parents could have a baby with blood type O? A) Parents 1 and 2 B) Parents 1 and 4 C) Parents 2 and 4 D) Parents 2 and 3 Hint for Question 32 See (sr) Genetics 8. What are the possible genotypes, try all of them. 33) THUMBNAIL 10 | The predicted phenotypic ratio for the children of parents 3 is A) 1/2 type A and 1/2 type B B) 1/4 type A, 1/4 type B, 1/4 type AB, and 1/4 type O C) 1/2 type AB and 1/2 type O D) 1/4 type A, 1/2 type O, and 1/4 type B Hint for Question 33 a punnett square will help Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: zhasoon on May 31, 2013 https://biology-forums.com/index.php?topic=67797.0
Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: EA on Nov 14, 2013 bio_man or Padre, could you pls help out with these question? thnx
Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: javeryd on May 13, 2014 need these exact questions to!! :theblues:
Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: 1ness2 on May 21, 2014 does anyone have the answers to these questions??? n Need these questions!! Anyone know them??Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: briiabbxo on Jun 5, 2014 All these questions havee been answered in previous fourms.
Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: zoeksyrianos on Jun 5, 2014 All these questions havee been answered in previous fourms. What are the answers? Mind posting them? :( Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: sciekid on Jul 10, 2015 can someone please post the link of the previous forums with answers. Please and thank you! :)
Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: ILoveBIO30 on Sep 28, 2015 Can someone help! i need to solve the same questions!
Help would be appreciated! :) Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: Bferner on Jan 7, 2016 need help. Anyone have the link?
Title: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: bio_man on Jan 8, 2016 need help. Anyone have the link? Any particular question that's bothering you? Title: Re: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: V.i.k.k.i on Apr 22, 2016 need help. Anyone have the link? Any particular question that's bothering you? #13 thumbnail #3 is bothering me could anyone please answer this one it would be greatly appreciated Title: Re: The sperm chromosome maps are more likely to be DeP than DEP. Explain. Post by: bio_man on Aug 14, 2017 https://biology-forums.com/index.php?topic=67797.0 That's a good start |