1. Windows peak (S) is dominant over straight hairline (s). Given that the mother has heterozygous gene pair for window's peak and the father has straight hairline. a. What is the genotype of the mother? b. What is the genotype of the father? * How many kinds of gametes can the mother produce? List them down. d. How many kinds of gametes can the father produce? List them down. e. Perform a cross using a Punnett sauare
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- 2.) (6) Assume that brown eyes are dominant = B, blue eyes are recessive = b. My first wife has blues eyes. I know I am homozygous dominant a. What is her genotype? b. What are her possible gamete genotypes? c. What is my genotype? d. What are my possible gamete genotypes? What genotype(s) do you expect of our offspring? Show your work (Punnett square is a good idea). e.12. A. B. C. A certain type of migraine headache (M) is dominant to no migraines (m). What is the genotype of a man who has migraine headaches if his father did not have them? What is the genotype of a man who has migraine headaches if his mother did not have them? If a woman without migraines marries a man who is heterozygous for migraines, what would you expect for the genotypes and phenotypes of their children? If two people who are heterozygous for migraines marry and have children, what would you expect for the genotypes and phenotypes of the children.1. In humans, widow’s peak or the mid-digital hairline is dominant over straight hairline. Consider a couple, who are both heterozygous for widow’s peak. If they only plan to have two children, what is the probability that the offspring will have: a. Both straight hairline b. Both a widow’s peak c. One with widow’s peak and one with straight hairline
- 1. In humans, brown eyes (B) are dominant over blue (b). A brown-eyed man marries a blue-eyed woman and they have three children, two of whom are brown-eyed and one of whom is blue-eye a. Draw the Punnett square that illustrates this marriage b. What is the man's genotype? c. What are the genotypes of the children?1. An albino man whose parents are both normal marries a woman one of whose parents is normal and the other albino. She has an albino sister. The couple has a normal son. a. Is albinism a dominant or a recessive trait? Explain your answer. b. Give the genotypes of all the persons involved. c.The couple plans to have more kids. What is the probability of their second child being normal?4. Chris and Emma are phenotypically normal but carriers for SCA (gene A). a. What are their genotypes? b. With respect to gene A, what are the possible genotypes of the gametes that they can produce. Chris: Emma: In front of each gamete genotype above write probability of producing that gamete. c. What is the probability that Chris and Emma will have a child affected with SCA? (affected=has the disease=“aa” =homozygous recessive) d. Write the cross and draw the Punnett square that demonstrates this. X e. The phenotypic ratio is The genotypic ratio is normal AA: affected Aa : aa
- 7. The ability to roll your tongue (R) is dominant to lack of this ability (r). A. What is the genotype of a man who can roll his tongue if his father couldn’t? B. If a man who is heterozygous for tongue rolling marries a woman who is heterozygous, what would you predict for the genotypes and phenotypes of their children?6. A man with type B blood marries a woman with type A blood. They have the first child with bloodtype O.a. What are the genotypes of the father and the mother?b. What is the genotype and phenotype of the baby? 7. A man with type O blood marries a woman with type AB blood. What is the predicted genotypicand phenotypic ratios of their children?1. Hereditary deafness in dalmations (d) is a recessive trait. What percentage of the progeny of crossing DD × Dd will be expected to be a carrier of the deafness allele, but not deaf? (enter a number only) 2.In snapdragons, a flowering plant, red (R) flower colour is dominant to white (r). The heterozygous condition results in pink flower colour. If a two pink flowered snapdragons are crossed, what is the resulting phenotype ratio? Select one: a.2:2 b.1:1:1:1 c.1:2:1 d.3:1 e. (all will be the same)
- 1. If the allelic composition of a gene is Aa, the genotype is said to be (homozygous, heterozygous). What is the probability of having "a" allele in gametes? 2. For a genotype of AaBb, what are the possible allele compositions in gametes? 3. What are the possible genotypes and phenotypes ("A" phenotype or "a" phenotype) in the offspring of a monohybrid cross Aa x Aa? 4. If the organism display a dominant phenotype for a trait ("A" phenotype), how does one determine if the genotype is homozygous or heterozygous? Please use the Punnett square to explain. 5. How many possible genotypes are there in the offspring of a dihybrid cross AaBb x AaBb? What are the possible phenotypes for such a cross? What is the phenotypic ratio for AB : Ab : aB : ab? D Focus 72°F DEA F4 PrtScr Insert Hor F5 F6 F7 F8 F9 F10 F11 F12 24 & 3. 8 E R T Y U7. A husband and wife have typical vision, although both of their fathers are red-green colorblind (an X-linked recessive trait). From this information, determine the appropriate symbols for the wild-type and color- blind alleles and write the genotypes of the husband and wife. b. What is the probability that the couple will have a son with typical vision? What is the probability that the couple will have a daughter with typical vision? d. What is the probability that the couple will have a son with colorblindness? What is the probabilityt the the couple will have a daughter with colorblindness?7. Assume that one of Squidward's sons, who is heterozygous for the light blue body color, married a girl that was also heterozygous. Create a Punnett square to show the possibilities that would result if they had children. A. List the possible genotypes and phenotypes for their children. B. What are the chances of a child with light blue skin? C. What are the chances of a child with light green skin?