Consider an individual with the AB/ab genotype, and assume that alleles of the A and B genes are unable to recombine during meiosis. If this individual is crossed with an individual who is homozygous recessive at both genes (ab/ab), what is the expected phenotype ratio in the offspring?

Q: A true-breeding plant with round and green seeds was crossed to atrue-breeding plant with wrinkled…

A: The parental cross is between true-breeding lines of wrinkled yellow seeds (rrYY) and round green…

Q: An individual  heterozygous for a reciprocal translocation possesses the following chromosomes:  A B…

A: Translocation is caused by the separation of a chromosome segment and its union with a…

Q: On average, what proportion of the genome in the following pairs of humans would be exactly the same…

A: Meiosis is a cell division through which gametes are produced. One diploid eukaryotic cell divides…

Q: Red–green color blindness is a human X-linked recessive disorder. A young man with a 47,XXY…

A: Color blindness is caused by a X-linked recessive allele. It is most prominant in males as males…

Q: Very rarely, one member of a pair of identical (monozygotic) twins will have Turner syndrome (XO)…

A: A chromosomal disorder in which a female is born with only one X chromosome leading to developmental…

Q: In humans, XO individuals are females with Turner syndrome and XXY individuals are males with…

A: The failure of homologous chromosomes (sister chromatids) to separate properly during cell division,…

Q: Draw a simple sketch illustrating how nondisjunction in meiosis can lead to Down syndrome.

A: To draw: A simple sketch illustrating how nondisjunction in meiosis can lead to Down syndrome

Q: On average, what proportion of the genome in the following pairs of humans would be exactly the same…

A: Chromosomes are carrier of deoxyribonucleic acid (DNA). DNA is the genetic material. Each cell has…

Q: Given that the gene for the color-blind condition is recessive and X-linked. You have a female with…

A: Maternal parent has a nondisjunction at Meiosis1 or 2

Q: After challenges containing the outbreak, the Kelatavicla lab had to close in January 2018 . Six…

A: The objective of the question is to predict the frequency of the R allele in a population of mice…

Q: what is the benefit of crossing over?

A: REPRODUCTION:- It is the production of offspring from the parents. It is of two types:- 1)Asexual…

Q: Butterflies have an X-Y sex-determination system that is different from that of flies or humans.…

A: -The butterfly shown has a completely unique pattern of colors because o a special trait- it has two…

Q: In Figure 4-3, would there be any meiotic products thatdid not undergo a crossover in the meiosis…

A: Meiosis is reductional divison.

Q: Female flies with white eyes and miniature wings (both X-linkedrecessive traits) were crossed to…

A: Chromosomal composition of these rare females will be – XXY. Both the X chromosomes must be coming…

Q: If a diploid cell entering meiosis has 12 chromosome pairs, what is the number of possible…

A: Meiosis is a process of cell division, where cell divides twice to produce four daughter cells which…

Q: EXAMPLE 2: The parents in the family above produce another son, this time with two Y chromosomes and…

A: Non disjunction is a event where either homologous chromosomes in meiosis I or sister chromatids in…

Q: On average, what proportion of the genome in the following pairs of humans would be exactly the same…

A: Every living species have two types of cells, somatic cells (diploid) which are responsible for…

Q: Determine whether the chromosomes are most difficult to segregate properly during meiosis in Down…

A: Introduction Trisomy is a type of aneuploidy. In trisomy, we find three copies of chromosomes…

Q: Please show the process of meiosis through Prophase 2

A: 1. Meiosis I:   - Prophase I: Homologous chromosomes pair up, and cross-over occurs between…

Q: If a diploid individual is 1n = 5 how many chromosomes are in a somatic (non-gamete) cell?

A: Chromosomes are the structures formed by the tight coiling of DNA threads and histone proteins…

Q: Shown below are photomicrographs of Rhoeo tradescantia cells undergoing meiosis. Answer the…

A: Introduction Mitosis is the division of replicated chromosomes into two new nuclei during the cell…

Q: non-disjunction and explain if it matters if it happens during meiosis I or meiosis II.

A: Meiosis is a type of cell division (CD) where four gametes or daughter cells are produced as a…

Q: Assuming that independence assortment occurs during meiosis what types of gametes will form…

A: Independent assortment is the separation of gene pairs independently from the other gene pairs.…

Q: Identify each of the following statements as true or false. The chromosomes in B are the result of…

A: In the question, we are given with an image representing two chromatids which later produced…

Q: Briefly describe nondisjunction in meiosis and identify several potential consequences. In other…

A: Meiosis is the type of cell division that occurs in the sex cells to produce gametes in the form of…

Q: For a certain chromosomal region, the mean number ofcrossovers at meiosis is calculated to be two…

A: For a certain chromosomal region, the mean number ofcrossovers at meiosis is calculated to be two…

Q: Assume that meiotic nondisjunction event causes trisomy 8 in a newborn. If two of the three copies…

A: Nondisjunction is that the failure of the chromosomes to separate, that produces daughter cells with…

Q: In chickens, the Leghorn variety has white feathers due to an autosomal dominant allele. Silkies…

A: An allele is one of at least two renditions of a gene. An individual acquires two alleles for every…

Q: Assume that a diploid cell (2N=8) contains 4 pairs of chromosomes (3 pairs of autosomes and 1 pair…

A: The gametes are formed by the process of meiosis that is subdivided into two stages called meiosis I…

Q: Assume that color blindness is a recessive character on the X chromosome. A man and woman with…

A: Introduction  Inheritance referred to the transmission of character/traits in the form of gene from…

Q: None

A: Genotype and Phenotype of Parents:Male (osk-/osk-): This male has two mutant alleles of the oskar…

Q: Explain, with the aid of a drawing, how a dicentric bridge is produced when crossing over takes…

A: Chromosome is a compact structure of a DNA molecule wrapped around some proteins. It is generally…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.