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- The following pedigree shows the pattern of inheritance of red green color blindness in a family. Females are shown as circles and males as squares; the squares or circles of individuals affected by the trait are filled in red. What is the chance that a son of the third-generation female indicated by the arrow will be color-blind if the father is a normal man? If the father is color-blind?A true-breeding rabbit with agouti (mottled, grayish brown) fur crossed with a true-breeding rabbit with chinchilla (silver) fur produces all agouti offspring. A true-breeding chinchilla rabbit crossed with a true-breeding Himalayan rabbit (white fur with pigmented nose, ears, tail, and legs) produces all chinchilla offspring. A true-breeding Himalayan rabbit crossed with a true-breeding albino rabbit produces all Himalayan offspring. Explain the inheritance of the fur colors.Imagine you are performing a cross involving seed color in garden pea plants. What Fi offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green. 100 percent yellow-green seeds 100 percent yellow seeds 50 percent yellow, 50 percent green seeds 25 percent green, 75 percent yellow seeds
- Two pairs of traits are segregating in a cross. Two parents produce 156 progeny that fall into 4 phenotypes. The numbers of offspring in the 4 phenotypes are 89, 31, 28, and 8. What are the genotypes of the two parents?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?The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc
- 1. How many different types of gametes can be produced by an individual with the genotype Yy Ww Pp ee Bb? 2. If an individual with the genotype Yy Ww Pp ee Bb is crossed with another individual with the same genotype, what proportion of offspring will be homozygous recessive at all genes? 3. If an individual with genotype Yy Ww Pp ee Bb is crossed with an individual with the same genotype, what proportion of offspring will have the dominant phenotype for the four heterozygous loci?1. In pea plants, yellow color (Y) is dominant over green color (y). A yellow-colored pea plant is crossed with a green-colored pea plant. Half of their offspring is yellow-colored while the other half is green-colored.What is the genotype of the yellow-colored parent? YY O Yy yy The genotype cannot be determined. 2. A scientist discovered an unknown organism in a tropical rainforest. The organism has been identified to possess the following characteristics: (1) multicellular at some point of its life cycle; (2) feeds on decaying organic matter; and (3) has a cell wall made of chitin.Which Kingdom does the unknown organism likely belong to? Kingdom Animalia Kingdom Plantae Kingdom Fungi Kingdom Protista 3. Which statement about ferns is TRUE? Ferns are unicellular organisms. Ferns are nonvascular plants. O Ferns have spores as reproductive structures. Ferns are capable of secondary growth.1. If a person's genotype for gene a and gene b is AaBb, what are the possible allelic compositions in a gamete (What alleles for gene a and gene b can be found in a gamete)? 2. Gene p specifies flower color. The dominant P allele specifies purple color, the recessive p allele specifies white color. What is the phenotypic ratio of purple flower : white flower in a monohybrid cross? 3. Gene y specifies seed color. The dominant Y allele specifies yellow color, the recessive y allele specifies green color. Gene s specifies seed skin. The dominant S allele specifies smooth skin, the recessive s allele specifies wrinkled skin. What is the phenotypic ratio of yellow color smooth skin : yellow color wrinkled skin : green color smooth skin : green color wrinkled skin for the offspring of a dihybrid cross? 4. Please consider the cross AABBCC x Aabbcc. What is the probability of producing an offspring with AABbCc genotype? What is the probability of producing an offspring with Aabbcc genotype?
- 6. Haemophilia is a relatively uncommon, sex-linked condition that is determined by a recessive allele on the X chromosome. It is a condition in humans in which the blood fails to clot normally. The following diagram shows a pedigree for haemophilia. Joe Sally Tom Tina 1 Jim Sheila 2 3 ? Mary Barry 4 5 6 7 Affected male Unaffected male Affected female Unaffected female a) Determine the possible genotypes for Jim, Sheila and their children (Sally, Tom and Mary). Use the symbols XH for the normal allele and Xh for the mutant allele and Y for the Y chromosome. Briefly state your logic in each case. b) Tom and Tina are expecting their first child and want to know the probability that the child had haemophilia i) if it is a boy or ii) if it is a girl. How would you advise them?6. Using a Punnet square, please calculate the probability of having a Aabb offspring in a cross AaBb x aaBb 7. What is the probability of having a AAbbCcDd offspring in a cross AaBbCCdd x AabbCcDD? (Please show how you derive your answer) 8. In a cross between a blood type AB male and a heterozygous type B female, what are the possible genotype and phenotype for the offspring? What is the phenotypic ratio? :On D. Focus h. 72°F LL F4 PrtScr Insert Home F5 EZ F8 F9 F10 F11 F12 & 3. 6 7 8. 09. E R Y7. In pea plants, the dominant allele for flower color is yellow (Y), and the recessive allele is white (y). If a homozygous dominant (YY) yellow-flowered plant is crossed with a heterozygous (Yy) yellow flowered plant what will be the possible genotypes and phenotypes of the offspring? Possible genotypes: Possible phenotypes: