Mendel's observation of the random distribution of two different traits from parents to offspring (giving the 9:3:3:1 ratio of phentypes) was due to    A. The random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I.  B. The random nature of the fertilization of ova by sperm.  C. The random distribution of the sister chromatids to the two daughter cells during anaphase II.  D. The relatively small degree of homology shared by the X and Y chromosomes.

Q: How does the process of crossing-over increase genetic diversity? Select one: a. Each gamete…

A: Crossing over occurs during pachytene sub-phase of meiosis-I. The non-sister chromatids of the…

Q: what is the likelihood that a male will inherit a sex-linked mutation on the X chromosome from his…

A: Chromosomes are the thread-like structures situated inside the nucleus of the cell. They are made up…

Q: Explain how Mendelssohn laws are related to meiosis

A: Gregor Mendel was a nineteenth century Moravian priest who showed that the inheritance of genes…

Q: When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation…

A: The result observed by Thomas Hunt Morgan, where all the white-eyed flies in the F2 generation were…

Q: What is it called when chromosomes fail to separate properly during meiosis? A. Nondisjunction B.…

A: The cell division is the process in which the cell divides into two or four daughter cells. There…

Q: The diploid chromosome number of a dog, Canis familiaris, is . Which of the following rows…

A: A chromosome is the structure housing DNA in a cell. Chromosomes are structurally quite…

Q: In a particular dihybrid (T/t, B/b) the alleles of the "T and "B"genes indicated in the figure below…

A: Meiosis is a process where a single cell divides twice to produce four cells containing half the…

Q: Which of the below explains why trisomy is better tolerated in humans than monosomy? (Select all…

A: 1. <!--<SUB-PART>--> (a) <!--<SUMMARY-INTRODUCTION>--> To Determine: If the…

Q: As a biologist, you complete a test cross between fly offspring to gain information about how two…

A: Looking at the data given majority are recombinant types. Recombination of genes occurs because of…

Q: During crossing over,a. chromatids of homologous chromosomes exchange parts.b. mutations occur with…

A: Answer- Cells undergo two different types of cell division called as mitosis and meiosis.

Q: At the end of meiosis in humans, four gametes are produced that are:   A. Genetically identical to…

A: Meiosis is a two-step cell division process that helps to produce sex cells or gametes. This is a…

Q: How do we know that X chromosomal inactivation of either the paternal or maternal homolog is a…

A: In mammals females contain two X-chromosomes and males contain one X-chromosome. The differences in…

Q: Give explanation  X and Y chromosomes are not homologs, but in meiosis they do pair and segregate…

A: During meiosis, the process of pairing and segregating chromosomes is essential for the formation of…

Q: Genes G and H are located on chromosome 18. A woman with the genotype Gg Hh has a child with a man…

A: Nondisjunction refers to the failure of homologous and sister chromatids to divide.

Q: One day while walking across campus, you see a female butterfly laying fertilized eggs, as shown in…

A: Butterfly is oviparous because oviparous animals lays eggs. Viviparous does not lays eggs and  In…

Q: For the following traits, what information must you have in order to predict the phenotype of an…

A: Answers :  A. The maternal influence can be seen in the coiling of snails. When there is a maternal…

Q: when one examines the pattern of inheritance of a trait and finds that it is transmitted from…

A: Sex linked inheritence Sex link inheritance means the jeans for characters other than sex are…

Q: . A woman with Turner syndrome is found to be colorblind (an X-linked recessive phenotype). Both her…

A: Turner syndrome is a chromosomal disorder that impairs women's development. Half of the sex…

Q: Which observation led Thomas Morgan to realize that the gene for fruit fly eye color was located on…

A: The genes are present on chromosomes that segregate independently into different gametes. Each…

Q: independent assortmen

A: Introduction Mendel's law of free arrangement expresses that the alleles of (at least two) unique…

Q: Which of the following statements accurately represents the difference between a gene and a locus?…

A: A gene is the most fundamental physical and functional element of heredity. DNA is the material that…

Q: The recombinant offspring of the F2 generation were produced by crossing over that occurred a.…

A: In 1864, the Austrian monk Gregor Johan Mendel published his work on plant hybridization…

Q: n 95% of cases of Down's syndrome, there is an entire extra chromosome 21 in every cell. This…

A: About 95% of the time, Down Syndrome is caused by trisomy 21. It is a condition in which the person…

Q: The beautiful red postman butterfly (Heliconius erato), shown below, has 21 pairs of homologous…

A: The gametogenesis is the process of formation of gametes. This gametes are formed on the basis of…

Q: chromosomes are inherited from one generation to the next, they are inherited...

A: Chromosomes are inherited generation to generation in such a way that half from their mother and…

Q: 1. If one parent is Tt, what alleles can they pass on to an offspring? (we're talking about a parent…

A: The cross between the two types of plants in the same species is called the monohybrid cross. The…

Q: A young man went to the doctor because he had small testes and enlarged breasts. Through chromosomal…

A: Chromosomal abnormalities occur due to the duplication or deletion of the section or whole of the…

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.