Which of the following statements regarding the Y chromosome in mammals is TRUE? A. The Y chromosome is less than half the size of the X chromosome. B.Y chromosomes are most often present in egg cells and are not found in sperm cells. C.Most female mammals have one Y chromosome. D. The Y chromosome contains no protein-coding genes.

Q: Which of the following statements does not correctly describe the characteristics of homologous…

A: Homologous chromosomes- Two pieces of DNA, one from each parental source present in a diploid…

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: If a set of chromosomes is one copy of each kind of chromosome, how many sets are in a human…

A: The formation of male and female gametes required meiotic cell division, in which the parent germ…

Q: In mammals, sex is determined bya. the SRY gene on the Y chromosome.b. having two copies of the X…

A: In a biological system, the development of sexual characteristics in an organism determined by the…

Q: You are interested in the expression of regions of the X chromosome at different times in human…

A: The investigation of the X chromosome at different phases of human fetal development is a complex…

Q: In Eukaryotic organisms, what are germ cells? A. In animals, germ cells are first cells that an…

A: The rest of the cells in the body, known as somatic cells, only undergo mitosis to divide. The term…

Q: Which of the following statements are correct? Explain your answers. A.  The egg and sperm cells of…

A: Answer- The gametes are formed after the meiosis in which the chromosomes are present in haploid…

Q: Why are multiple copies of the X chromosome tolerated?

A: In females, two X are present whereas in males only one X is present. To balance the expression of…

Q: In an organism’s genome, autosomes are a. the chromosomes that differ between the sexes. b.…

A: Genetics is the branch of biology that deals with genetic material like DNA, RNA, inheritance.…

Q: In fruit flies, dosage compensation is achieved bya. X-chromosome inactivation.b. doubling the…

A: Dosage compensation refers to the mechanism of equalizing or balancing the expression of genes. It…

Q: How does X inactivation contribute to a person’s phenotype? a. It controls the number and kind of…

A: X chromosome denotes one of the two sex chromosomes, another is the Y chromosome. Females are…

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: If a liver cell in an insect contains 24 chromosomes, how many chromosomes are found in its sperm?…

A: Gametogenesis is a specific interaction through meiosis where gametes are produced. The gametes…

Q: Humans with aneuploidy who survive usually have incorrect numbersof chromosome 13, 18, or 21 or the…

A: Aneuploidy involves the addition or deletion of one or more chromosomes, which is a part of a genome…

Q: Match the species with the way they determine the sex of an embryo (1 each) Mammals a. the Y…

A: Different mechanisms govern sex in different organisms. Some organisms involve two different kinds…

Q: In a trisomic individual, such as a person with trisomy 21 (Down syndrome),a genetic imbalance…

A: Trisomy 21 is a common genetic defect that is caused by chromosomal abnormalities. Trisomy 21 refers…

Q: In an embryo from a homozygous Bicoid mutant female,which class(es) of gene expression is (are)…

A: The embryo is an early stage of the development of a multicellular organism. Embryonic development…

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: In mammals, sperm contribute the usual haploid genome, a centriole, and a micro RNA for Bcl2.  What…

A: Micro RNA is essential for the early embryogenesis, formation, and maturation of tissues and stem…

Q: Chromosome duplications often result in abnormal phenotypes because a. developmental processes…

A: Duplication is a type of mutation. It involves the production of more copies of a particular region…

Q: What biological mechanism allows humans with an XXX genotype to be healthy individuals?

A: Answer. Option (c) X inactivation

Q: Can chromosome duplications cause negative effects to an organism? Why or why not?   A. No.…

A: In genetics, chromosome duplications can be described as a process that includes mutations causing…

Q: A patient has mental deficiency, a short stature, and the mongolian type of the eyelid fold. The…

A: A pateint has mental deficiency, a short stature, and Mongolian type of the eyelid fold. The…

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: According to the Lyon hypothesis,a. one of the X chromosomes is converted to a Barr body insomatic…

A: Lyon hypothesis, proposed by Mary Lyon states that the random inactivation of the X chromosome in…

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: Identical twins each carry the same genome, but over time, can develop different phenotypes. How can…

A: Identical twins are formed as a result of the fertilization of a single egg. The zygote later splits…

Q: As pointed out in the section Evolution of the Y Chromosome, some researchers have predicted that…

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: Which of the following best describes Klinefelter syndrome?   A. It is an example of aneuploidy.…

A: Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of  X…

Q: What will be the effect on sexual development in newly fertilized Drosophila embryos if the…

A: In Drosophila, sex determination is achieved by a balance of female determinants on the X chromosome…

Q: What is characteristic of a pair of homologous (maternal and paternal) chromosomes? O a. G banding…

A: Introduction:- Homologous chromosomes, also known as homologs, are made up of two chromosomes, one…

Q: How is homologous recombination for DNA repair different from recombination in meiosis? Choose all…

A: Homologous recombination (HR) is a significant DNA repair process in bacteria.  Also, produce…

Q: Insect wings are coded for by the same gene that creates... A. internal air branches (trachea) B.…

A: Introduction: Insects are any of a group of small arthropods with six jointed legs and a body made…

Q: Which of the following statements is FALSE? Inactivation of one of the two X chromosomes in the…

A: They were discovered in 1876. These are the tertiary structures of DNA formed as a result of complex…

Q: Individuals with XYY chromosomes are said to be "supermale". Which of the following is FALSE…

A: Humans are said to have 23 pairs of chromosomes which makes a total of 46 when the cells are normal.…

Q: Rainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male…

A: Chromosomes are thread-like structures present inside the nucleus of the cell. Usually, they are…

Q: Eukaryotic chromosomes a. have only histones b. have DNA and RNA c. have DNA, RNA, and protein d.…

A: There are different macromolecules present in the body. Carbohydrates, lipids, proteins, and nucleic…

Q: The Y chromosome has been shrinking throughout mammalian evolution, but many of its remaining genes…

A: The Y chromosome likely contains 50 to 60 genes that provide instructions for making proteins.

Q: Rainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male…

A: (Comment : As per the guidelines, we are allowed to answer one question at a time, so I am answering…

Q: In animals there are many aneuploidies in sex chromosomes that have relatively mild phenotypes.…

A: Aneuploidy of autosomes is not tolerable and usually lethal because of the fact that embryos have…

Q: Which of the following statements is false?   A. Humans have 1 pair of sex chromosomes   B. Humans…

A: Before exploring the answer ,we must be well equipped with the definition of sex Chromosomes and…