Genetics Exam 3

An individual with Klinefelter’s Syndrome has a mother who is a carrier of Duchenne muscular dystrophy. What is the probability that this individual will develop the disease?

What is the probability that two individuals with achondroplasia will have affected children?

Which of the following is not a proto-oncogene?

What is the probability that two daughters inherited the same X chromosome from their mother?

ABO blood type is determined by alleles that show

A man has classic hemophilia. From which of the following individuals could he not have inherited the allele for this trait?

If non-disjunction of chromosome 21 occurred in the first meiotic division, how many gametes would be aneuploid?

An albino woman with normal vision has children with a red-green color blind man with normal skin pigmentation. She is homozygous at the two loci; he is heterozygous for the skin pigmentation trait. What is the probability that their sons will be albino and color blind?

In a cross of a white-eyed Drosophila female and a red-eyed male, rare white eyed female progeny are genotypically

If a woman’s aunt and grandmother were carriers of a BRCA1 mutation, what is the probability that the woman will be predisposed to breast cancer? Assume all other family members do not carry the mutation.

What is the probability that a family with three children will have at least one girl?

Which of the following processes is BRCA1 not involved in

The synaptonemal complex begins to form during

A woman with achondroplasia who is also a carrier of diastrophic dysplasia has children with a man who has diastrophia dysplasia (and is not achondroplastic). What is the probability that their children will have short stature?

Which of the following would generate an oncogenic allele?

Consider a diploid cell with 3 pairs of chromosomes. What cell division event is occurring in this cell:

Functional and motile sperm cells are also referred to as

In an organism with 16 chromosomes per cell in G1, how many DNA molecules are present in a cell undergoing anaphase of mitosis?

A human condition called osteogenesis imperfecta is inherited as an autosomal dominant trait. This condition manifests itself in different ways in affected individuals – blueness of the sclera (whites of the eyes), fragile bones, and deafness. All heterozygotes manifest one or more of the above symptoms but in various combinations and in differing severity. Genetically, this condition would be characterized as

Consider a diploid organism with two pairs of homologous chromosomes. What proportion of the gametes of this organism would carry chromosomes derived from both of the parents of this organism?

Consider a classic dihybrid cross of pea plants. What is the frequency of progeny with one dominant phenotype and one recessive phenotype?

What is the probability that the unaffected children of two parents who are carriers of Diastrophic Dysplasia will also be carriers?

In the F2 generation, how many genotypic classes are generated from a standard dihybrid cross of two individuals heterozygous at two loci, in which the genes involved show complete dominance?

The Ras protein has what kind of activity?

A litter of kittens produced by a calico cat is not expected to contain

In humans, the cell that is fertilized by a sperm is the

Consider the following pedigree. Which of the following mode(s) of transmission would account for the trait’s segregation pattern?

smaller one: (unaffected mother and father-->> affected daughter and unaffected son)

Genes A, B, and C segregate independently and are dominant to their respective a, b, and c alleles. Two triply heterozygous individuals are crossed. What is the probability that their progeny will be heterozygous at all loci?

What will be the progeny ratio if a female carrier of red-green color blindness has children with a normal male?

In a pea plant that is heterozygous for seed color and seed shape, what proportion of gametes will carry the recessive alleles?

During which cell division phase(s) do sister chromatids separate?

Which individuals on the above pedigree are definitely heterozygous?

First Pedigree: (unaffected parents-->>some unaffected children)

...Just remember that "I-1, I-2, II-1 and II-2" would be the answer...

The Philadelphia chromosome translocation creates generates

Manx cats have no tails. When two Manx cats are bred together there is always a one third chance that a kitten will have a tail. When a Manx cat is bred to a cat with a normal tail there is a one-half chance that a kitten will have a tail. Which of the following is the best explanation for this?

Recombination between homologous chromosomes occurs in which phase of meiosis?

A woman of blood group AB has children with a man who is blood group A and whose father was of group O. What is the probability that they will have two sons, one of whom is AB, the other B?

If non-disjunction of chromosome 21 occurred in the second meiotic division, how many gametes would carry an extra copy of this chromosome?

Consider the following pedigree. Which of the following mode(s) of transmission would account for the trait’s segregation pattern?

Larger one( unaffected mother--affected father-->>half affected sons and daughters)

Which of the following is not possible?

Consider the following pedigree. Which mode of transmission would best account for the inheritance of the trait?

First one: (unaffected parents-->> some effected children)