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in cattle, “short spine” is lethal shortly after birth; it is caused by the homozygous recessive genotype, ss. Heterozygotes are normal.
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- In the ABO blood group, type A has three subtypes with an order of dominance shown as A 1> A 2> A 3 a. What are the genotypes of each subtype? Make sure the alleles are big and clear enough toshow the superscripts. b. Is it possible for a types A 1 and A 3 parents to have a type A 2 child? Show the complete cross.Which are the following are TRUE for test crosses? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a They are useful when the genotype of a dominant phenotype is unknown. b They are always done by crossing the dominant phenotype to a homozygous recessive individual for that trait. c This test is always done in humans. d A + B e A + C f B + CIn cattle, “short spine” is lethal shortly after birth; it is caused by the homozygous recessive genotype, ss. Heterozygotes are normal. What is the phenotypic ratio produced by the cross at after birth? 3:0 3:1 1:2:1 all alike
- Hemophilia is caused by an x-linked recessive allele. Make a cross between a hemophilic Father and a non-hemophilic Mother whose Father had hemophilia. 1. P1: 2: Punnett Square: Interpretations Female: 3. GR: 4. G% 5. PR: 6. P%: Male: 7. GR (Genotype Ratio): 8. G% 9. PR (Phenotype Ratio): 10. P%:Two summer white squashes with genotype WwYy were crossed (W= white color, Y=yellow color, w and y= green color) W is epistatic to Y and y. What would be the different colors of summer squashes obtained out of the above cross? (2 pts.) A. 12 white: 3 yellow:1 green B. 12 yellow: 3 white: 1 green C. 12 green: 1 white: 3 yellow D. 12 yellow: 3 green: 1 whiteSickle Cell Anemia affects blood types in humans and represents what type of relationship compared to normal alleles? 1.Codominance 2.Incomplete Dominance 3.Epistasis 4.Dominant Lethal 5. It is not clear and could be 1 or 2
- The monohybrid crossing of heterozygous organism is analyzed. Which distribution of progeny genotypes will be: Select one: O a. 3:1 O b. 1:2:1 O C. 1:1 d. 9:3:3:1 O e. 9:7What is the phenotypic ratio of the offspring when a man who has type A blood, and whose mother had type O blood, marries a woman who has type AB blood? a 2 type A : 1 type AB : 1 type B b 3 type A: 1 type B c 1 type A : 1 type O d 1AA :1AB : 1AO : 1BODistinguish the following terms . A complete dominance and co - dominance B. genotype and phenotype
- Using the following information perform following crosses using the forked line and predict all possible phenotypes types of the offspring. List the number and description of the phenotypes of the offspring. 1. aa BB Cc Dd Ee X aa bb Cc Dd EE 2. Ff Rr Gg dd Bb X Ff RR Gg Dd Bb 3. Dd gg JJ bb Hh Ee X DD GG Jj Bb Hh EeIn a test cross, peas of an unknown genotype are crossed with peas of a known genotype. In this example, smooth peas are the unknown and wrinkled peas are the known (rr). If half of the offspring from that cross are smooth and half are wrinkled, what is the genotype of the unknown plant? O a. Homozygous dominant: RR O b. Homozygous recessive: rr Oc. Incomplete dominance d. Heterozygous dominant: Rr CLEAR MY CHOICEPlease consider the pedigree below. There are no cases of false paternity. The ABO blood group phenotypes of individuals who marry into the family are a true reflection of their ABO genotypes. image attached I a. Which individual/s definitely has/have Bombay phenotype in the descendants of I-1 and I-2? b. What are the genotypes of individuals I-1 and II-2 at the ABO and H loci?