12. Suppose a parent carried two different alleles for a gene on a pair of homologous...
12. Suppose a parent carried two different alleles for
a gene on a pair of homologous chromosomes. One allele, B, gave
rise to dark brown eyes, and one allele b gave rise to light brown
eyes. After one meiotic event, what are the chances that a
gamete would carry a B allele?
13. Over half of the bananas produced globally are the Cavendish
cultivar (big, yellow bananas.) These plants are all created
by cuttings from a parent plant. Would these plants be genetically
identical or different from each other?
Homework Answers
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12. Suppose a parent carried two different alleles for
a gene on a pair of homologous...
1. Suppose one gene has alleles A and a. Remember that most organisms are diploid; i.e.,...
1. Suppose one gene has alleles A and a. Remember that most organisms are diploid; i.e., they contain homologous chromosomes with identical genes, although the alleles may be different on each homologue. Gametes, on the other hand, are haploid, containing only one of the two homologues, and thus only one of the two alleles. The genotype of an organism is its genetic constitution, i.e., the alleles present. For each of the following diploid genotypes, indicate the possible genotypes...
What are alleles? Genes for different traits, such as hair color and eye color Alternative forms...
What are alleles? Genes for different traits, such as hair color and eye color Alternative forms of a gene for a single trait, such as blue eyes or brown eyes The locations of genes on a chromosome Recessive forms of a kind of characteristic carried by genes Dominant forms of a kind of characteristic carried by genes In order to have the additional information provided by the location of the centromere in chromosomes, the process of karyotyping uses a chemical...
In gerbils, the gene that specifies coat color is sex‑linked and has multiple alleles, as follows:...
In gerbils, the gene that specifies coat color is sex‑linked and has multiple alleles, as follows: B ‑ black, br ‑ brown, by ‑ yellow, and b ‑ albino. The allele br is incompletely dominant over by, the combination br by giving tan color; otherwise, dominance is in the order given ‑‑ B, br, by, b. (For your information, gerbils are mammals.) A black gerbil mated with a yellow gerbil gave one brown male and one black female offspring. a....
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain is mated to a red eye, short wing fruit fly from a pure breeding strain. All of their offspring (F1) had red eyes and long wings. In Cross 2, one of the F1 offspring is mated to a fly with yellow eyes and short wings, and this cross gave the following F2 population: 194 flies with long wings and red eyes, 796 flies with...
1) The alternate forms of a gene for the same trait are known as -A)alleles. B)phenotypes....
1) The alternate forms of a gene for the same trait are known as -A)alleles. B)phenotypes. C)genotypes. D)codominants. E)incomplete dominants. 2) Mendel carried out most of his research with A)livestock -B)pea plants. C)guinea pigs. D)fruit flies. E)bacteria. 3) Which of the following is true according to Mendel's law of segregation? A)Each individual contains two alleles for each trait. B)Fertilization restores the presence of two alleles. C)Alleles separate from each other during gamete formation. D)Each gamete contains one copy of each...
19. Two different gene loci are responsible for determining mouse coat color. A recessive lethal allele...
19. Two different gene loci are responsible for determining mouse coat color. A recessive lethal allele contributing to yellow coat color also exists for one of these two gene loci. The following genotypic and phenotypic information about the mouse coat color alleles is known: (6) Agouti = A-B- • Yellow = AA'B-or A'aB-or A'ab- Lethal (inviable zygote) = A'A- Black = aaB- Albino = -bb a. A cross is made that produces 2 yellow, 1 black, and 3 albino mice....
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c....
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c. may have different alleles d. have very similar DNA sequences e. all of the above f. none of the above 2. (3 pts) List the three ways that sexual reproduction increases the genetic variability of a population more than does asexual reproduction. 3. (2 pts) An organism has six independent (unlinked) genes and the following genotype: aaBbDdEEffag. How many different gametes could this organism...
Match the following terms with the appropriate description below: a. alleles b. autosomes c. dominant allele...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
5. Fur colour in mice is a single gene trait controled by two alleles. In a population of 75 mice, 21 are homozyg...
5. Fur colour in mice is a single gene trait controled by two alleles. In a population of 75 mice, 21 are homozygous dominant, 37 are heterozygous dominant, and 17 are homozygous recessive. What is the frequency of the dominant allele in the population? Show all work and record your answer as a value between O and 1 rounded to two decimal places 6. The Hardy-Weinberg principle states that allele and genotype frequencies remain constant from one generation to the...
**Please answer ALL 10 QUESTION** 1. A species of flowering plant includes plants with blooms that...
**Please answer ALL 10 QUESTION** 1. A species of flowering plant includes plants with blooms that range from bright golden yellow to very pale yellow; no flowers carrying the yellow pigment allele appear white. The allele for yellow flower color: a. must be a suppressor of another allele. b. demonstrates incomplete penetrance. c. demonstrates variable expressivity. d. must be a modifier of another allele. e. demonstrates variable penetrance. 2. Coat color in mice is determined by two alleles acting at...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain is mated to a red eye, short wing fruit fly from a pure breeding strain. All of their offspring (F1) had red eyes and long wings. In Cross 2, one of the F1 offspring is mated to a fly with yellow eyes and short wings, and this cross gave the following F2 population: 194 flies with long wings and red eyes, 796 flies with...
1) The alternate forms of a gene for the same trait are known as -A)alleles. B)phenotypes. C)genotypes. D)codominants. E)incomplete dominants. 2) Mendel carried out most of his research with A)livestock -B)pea plants. C)guinea pigs. D)fruit flies. E)bacteria. 3) Which of the following is true according to Mendel's law of segregation? A)Each individual contains two alleles for each trait. B)Fertilization restores the presence of two alleles. C)Alleles separate from each other during gamete formation. D)Each gamete contains one copy of each...
19. Two different gene loci are responsible for determining mouse coat color. A recessive lethal allele contributing to yellow coat color also exists for one of these two gene loci. The following genotypic and phenotypic information about the mouse coat color alleles is known: (6) Agouti = A-B- • Yellow = AA'B-or A'aB-or A'ab- Lethal (inviable zygote) = A'A- Black = aaB- Albino = -bb a. A cross is made that produces 2 yellow, 1 black, and 3 albino mice....
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c. may have different alleles d. have very similar DNA sequences e. all of the above f. none of the above 2. (3 pts) List the three ways that sexual reproduction increases the genetic variability of a population more than does asexual reproduction. 3. (2 pts) An organism has six independent (unlinked) genes and the following genotype: aaBbDdEEffag. How many different gametes could this organism...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
5. Fur colour in mice is a single gene trait controled by two alleles. In a population of 75 mice, 21 are homozygous dominant, 37 are heterozygous dominant, and 17 are homozygous recessive. What is the frequency of the dominant allele in the population? Show all work and record your answer as a value between O and 1 rounded to two decimal places 6. The Hardy-Weinberg principle states that allele and genotype frequencies remain constant from one generation to the...
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