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Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
The information for any hereditary trait is present in the gene of the organisms. Genes in simple terms are nucleotide sequences that code for a functional protein. It is represented in the form of alleles, which are present in pairs.
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- F. II QUESTION 5 Both you, your sister and brother have attached earlobes but your parents have unattached earlobes. Unattached earlobes (E) are dominant over attached earlobes (e). What are the genotypes of your parents? What is the genotype ratio that results in this cross? What is the genotype of you and your siblings? A. Ee B. 1:2:1 Parents C. ee Genotypic Ratio D. 3:1 Genotype of you and siblings. E. EE F. NO match Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save roll to see more 2.3641. What percentage of the offspring will have a homozygous recessive genotype? Gray fur White fur 2. What will be the ratio of gray fur to white fur in the offspring? 33 x 89 3. What percentage of the offspring will have a tall phenotype? Tall Short 4. What percentage of the offspring will have a homozygous recessive genotype? TT tt White eyes Dark eyes have white eyes? 5. What percentage of the offspring will 6. What percentage of the offspring will have a heterozygous genotype? PR PUO pp pa × Long beak Short beak 7. What percentage of the offspring will have a homozygous dominant genotype? 11 8. What will be the ratio of long beaks to Tutorial Sche1. What percentage of the offspring will have a homozygous recessive genotype? Gray fur White fur 2. What will be the ratio of gray fur to white fur in the offspring? Gg x gg 3. What percentage of the offspring will have a tall phenotype? t. Tall Short 4. What percentage of the offspring will have a homozygous recessive genotype? TT tt 5. What percentage of the offspring will have white eyes? White eyes Dark eyes 6. What percentage of the offspring will have a heterozygous genotype? 7. What percentage of the offspring will
- 15. A mother who is homozygous type A and a father who is homozygous type B will have a child with what blood type? A. A C. AB B. B D. O 16. Can a type AB mother and a type O father have a type B baby? A. yes (50% chance) C. can't be determined B. no D. yes (25% chance) 17. What percentage of the population are secretors? A. 20% B. 50% C. 80% D. 100%5. What are the chances of an offspring being homozygous recessive for a trait if they have two heterozygous parents? A. 1/4 В. 1/2 С. 3/4 D. 15. What is the probability that a child will be born with sickle-cell anemia if his mother is heterozygous dominant and his father is homozygous dominant for the hemoglobin's shape gene? H normal gene for hemoglobin's shape; dominant h abnormal gene for hemoglobin's shape; recessive a. 50% chance b. 75% chance c. 25% chance d. 0% chance
- 1. A disease is known to be inherited through an ADHL mode of inheritance. For a pairing of two affected individuals, what is the expected proportion of offspring that will be affected AND female? A. 0. B. 0.667. C. 0.333.1. If your genotype is Bb, what type of trait would you express as phenotype? a. dominant b. recessive c. both a and b d. neither a nor b 2. If your genotype is BB, what type of trait would you express as phenotype? a. dominant b. recessive c. both a and b d. neither a nor b 3. If a baby goat received a dominant gene for curly hair from one parent, and a recessive gene for straight hair from the other, which trait will the baby goat display? a. No hair b. Curly hair c. Straight hair d. Straight and curly hair 4. The allele for yellow seeds in pea plants, Y, is dominant. The allele for green seeds in pea plants, y, is recessive. Which combination would produce a plant with green seeds? a. YY b. Yy c. yY d. yy 5. In humans, the allele for brown eyes, B, is dominant over the allele for blue eyes, b. Which combination of alleles shown below could result in a…1.Which among the following statements is INCORRECT? A.Phenotype is the pair of genes that carries the genetic makeup of an organism B.Homozygous is a combination of two dominant or two recessive allele C.A recessive allele must be received from both parents to bring about a recessive phenotype D.Heterozygous is a combination of one dominant allele and one recessive allele
- 1. Hemophilia is a sex-linked genetic disease caused by a recessive allele. If a woman who was a carrier for hemophilia married a man who was healthy, what fraction of their children would be likely to have hemophilia? A. 1/4 B. 1/2 C. 0% chance their children would get it D. 3/4 2. In cats, black fur color is dominant over brown fur color. If a heterozygous black cat was crossed with a brown cat, what fraction of the kittens would be black? A. 50% B. 25% C. 75% D. 0%Using letters A and a for the genes, what is the genotype of individual II-7 (hint, take a look at their children). 1 II 3 4 III 1. 3 9. 8 9. 10 IV 1. 3 4 6 7. 8. 1 O AA O Aa О а O Aa or AA 2. 4. 2. 2.1. A woman will give birth to a quadruplets without knowing the gender. What is the probability of having an equal number of male and female? A. 3/16 B. 3/4 C. 1/8 D. 1/4 E. 3/8 2. A woman will give birth to a quintuplets without knowing the gender. What is the probability of having a one male and four female? A. 5/32 B, 5/64 C. 5/12 D. 5/16 E. 5/8 3. What is the chance of a blue-eyed father passing its trait to his child if the mother has a pure breed of brown eyes? Brown eyes are dominant to blue eyes. A. 100% B. 75% C. 0% D. 50% E. 25%