Heredity
Crossover Frequency
Crosses
Multiple Alleles
Pedigree
100
Suppose a child is of blood group A and the mother is of blood group O. What genotypes may belong to the father?
What is IaIa or Iai
100
The following recombination frequencies were found. Determine the order of these genes on the chromosome by making a gene map: A,C (10%) A,D (30%) A,E (6%) B,C (4%) B,D (16%) B,E (20%) and C,D (20%)
What is A, E, C, B, D
100
A plant producing white funnel-shaped flowers is crossed with one producing cream salver-shaped flowers. 96 offspring were produced, all having white salver-shaped flowers. What would result in the F2 generation of this cross?
What is 9 dom:dom (white salver), 3 dom:rec (white funnel), 3 rec:dom (cream salver), 1 rec:rec (cream funnel)
100
Colour patter in a species of duck is determined by one gene with three alleles. Alleles H and I are codominant, and allele i is recessive to both. How many phenotypes are possible in a flock of ducks that contains all the possible combinations of these three alleles?
What is 4
100
The pedigree (pg. 104 SNAP) traces the inheritance of alkaptonuria, a biochemical disorder. Affected individuals are unable to break down a substance called alkapton, which colours the urine and stains body tissues. Decide what inheritance pattern you think alkaptonuria shows and justify all patterns it is NOT.
What is autosomal recessive
200
A plant producing white funnel-shaped flowers is crossed with one producing cream salver-shaped flowers. 96 offspring were produced, all having white salver-shaped flowers. 96 offspring were produced, all having white salver-shaped flowers. What are the genotypes of the parents?
What is WWss and wwSS
200
W and X - 21.5% X and Y - 19.5% Z and Y - 41.1% W and Z - 43.1% Z and X - 21.6% What is the gene map for these genes?
What is WYXZ
200
Phenylketonuria is a rare metabolic disorder in which the individual cannot produce the enzyme needed to break down excess phenylalanine. An accumulation of phenylalanine can cause severe damage to the nervous system. The defect is caused by a recessive allele. It is possible to determine if a person is heterozygous for the trait. Two heterozygous parents have 4 children. What is the probability that none of the children have phenylketonuria? What is the probability that all of the children will have phenylketonuria?
What is 81/256 and 1/256
200
A man suffering from a genetic disease seeks advice from a genetic counselor. The man explained that his maternal grandfather had the disease but his maternal grandmother did not. The mother of the man was unaffected, nor were any of her siblings. The man's mother was the youngest of 5 children. The mother's oldest 3 siblings were brothers. her other sibling was a sister. The man had an older sister who was affected and a younger sister who was not. Produce a pedigree for the family and type of inheritance.
What is See Pg. 15 of SNAP Solutions
300
A man with blood type A whose parents both had type AB blood marries a woman with type B blood whose father had type B blood and whose mother had type O blood. List the genotypes of these people: Man's parents, Man, Woman's Father, Woman's mother, Woman, What phenotypic ratio would you expect for the couple's children?
What is IaIb, IaIa, IbIb or Ibi, ii, Ibi, 0.5 will be AB and 0.5 will be A.
300
In Fire-breathing Monsters, the genes for leg length, hair thickness and eye colour all exist on chromosome #3. Long leg (L) is dominant to short leg (l), thick hair (H) are dominant to thin hair (h) and red eyes are dominant (R) to white (r). First in the P1 cross, a Fire-breathing Monster LLHHRR is crossed with llhhrr. Draw a pair of the F1 individual's chromosomes #3 as they would appear at the beginning of meiosis, and label the three genes on them. Draw the same pair of chromosomes at the end of prophase 1, during which L and l were crossed over.
What is See SNAP Solutions Pg. 15
300
Manx are rather strange looking cats. They have a large bum that sticks out and no tail. The Manx cats are heterozygous. Unfortunately, the homozygous form of the dominant allele has such a strong effect on skeletal development that the cat dies as a fetus. What phenotypic ratio would you expect in the surviving offpsring from the cross of two Manx cats?
What is Of surviving 2/3 Manx and 1/3 normal
400
In Labrador retriever dogs, the dominant allele B determines black coat colour and b produces brown. A separate epistatic gene E results in the golden coat colour. The recessive form e allows the expression of B and b. A breeder wants to know the genotypes of her three dogs so she breeds them and makes note of the offspring of several litters. Determine the genotype of the three dogs. Gold female (dog 1 _____ x Golden male (dog 2) ______ Offspring: 7 golden, 1 black, 1 brown Black female (dog 3) _______ x Golden male (dog 2) Offspring: 8 golden, 5 black, 2 brown
What is Dog 1 - Eebb Dog 2 - EeBb Dog 3 - eeBb
M
e
n
u