Chromosomes are present in pairs in the body cells of animals. What is their origin? A....
Chromosomes are present in pairs in the body cells of animals. What is their origin?
A. One member of each pair from each parent
B. There is random mixing of chromosomes from both parents
C. All of the chromosomes may have come from one parent
D. Eleven pairs + one single chromosome from the mother and eleven pairs + one single chromosome from the father
Homework Answers
Each cell of the body contains 23 pairs(46) chromosomes. These
were obtained from parents. Among these 46, 23 obtained from male
parent and 23 obtained from female parent. This is because the
gamates(egg and sperm) contain 23 chromosomes each which is haploid
to maintain constant number in further generation. Thus egg and
sperm fuses in reproduction resulting in the formation of 46
chromosomes diploid zygote which develops into offspring. So,
option A is correct as one chromosome of each pair comes from each
parent. 
The picture showing obtaining one chromosome from each parent to form a pair.
Add Answer to:
Chromosomes are present in pairs in the body cells of animals.
What is their origin?
A....
Question 2: The Atlas blue butterfly has 224 homologous pairs of chromosomes. Each pair consists of...
Question 2: The Atlas blue butterfly has 224 homologous pairs of chromosomes. Each pair consists of one chromosome from the butterfly's mother and one from its father. A. Assuming no crossing over, what is the probability that a sperm this butterfly makes has all of the chromosomes from the butterfly's own father? Why? (You do not need to calculate out this number- a number with an exponent is fine.) (roughly 3-4 sentences) B. How many chromosome 17's does this butterfly...
9. Different genes are located on different kinds of genetic elements - autosomes, W chromosomes, the...
9. Different genes are located on different kinds of genetic elements - autosomes, W chromosomes, the mitochondrial genome, etc. Different elements are inherited in different ways, so different offspring inherit different elements from different parents. For each case, answer both parents', 'mother', 'father', or 'neither parents. For instance, sons inherit autosomal genes from both parents, but sons inherit W chromosome genes from neither parent (because males are ZZ, and don't have a W chromosome...) (1 point per answer) Daughters inherit...
Question 18 2 pts Homologous chromosomes describe the pairs of chromosomes that diploid organisms, such as...
Question 18 2 pts Homologous chromosomes describe the pairs of chromosomes that diploid organisms, such as humans, possess. Which of the statements about homologous chromosomes is true? Siblings share all the same homologous chromosomes (e.g. One sister has all the same chromosomes as her older sister. O Homologous chromosomes are genetically identical to one another. O People get one of each homologous chromosome from either biological parent. If you examine a pair of homologous chromosomes, they possess different genes.
An antigen found on red blood cells, Xg, is encoded by an X-linked allele (Xa) that...
An antigen found on red blood cells, Xg, is encoded by an
X-linked allele (Xa) that is dominant over an allele for the
absence of the antigen (X–). Scientists studied the inheritance of
these X-linked alleles in children with chromosome abnormalities to
determine where nondisjunction of the sex chromosomes occurred.
Match the genotypes of the parents and offspring to the parent
and cell division stage in which the nondisjunction must have
occurred. Shown as parent × parent = child.
Nondisjunction...
if a father has the defective chromosome and mom has good chromosome what is the probability...
if a father has the defective chromosome and mom has
good chromosome what is the probability he will get the defect
gene?
xY or Yx bad genes
ise) oa child As me th the chid s east e o he eves w be brownThe actunt determinio List the different possible outcomes. Assume that these outcomes re What is the probability that a child of these parents will have the bloe/e genotype What is the probability that the child will have...
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2....
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2. Assume chromosome! is clearly larger than chromosome 2. Each chromosome pair contains a maternal and a paternal member (e.g. 1 and 1 & 2 and 2"). An allele called G is localized to 1" whereas an allele called g is on chromosome 1P. Allele R is localized to 2m whereas alleler is localized to 2. Using these designations and clearly drawn and labeled chromosomes,...
Simulate meiosis by drawing Two pairs of chromosomes with crossing over Assume that two of the...
Simulate meiosis by drawing Two pairs of chromosomes with crossing over Assume that two of the genes are on chromosome 1, and one of the genes is on chromosome 2. Allow crossing over to occur between the two genes on the same chromosome. Also, are there multiple ways that the chromosomes could segregate to produce different results? Show them. Instructions: Set up your cell. The cell you start with should be: A diploid cell It should contain 2 pairs of...
Choose the correct answers for the following questions. Also explain the biology behind why answers are...
Choose the correct answers for the following questions. Also explain the biology behind why answers are scientifically accurate. L.If' a single point mutation occurs at a random place in the genome, what is the most likely outcome? 1. The mutation will have a noticeable negative effect on the organism. 2. Th 3. The mutation will lead to a noticeable gain-of-function in a agene 4. The mutation will have a noticeable positive effect on the organism 5. The mutation will have...
22. [9 PTS] Turner syndrome results when an individual has a genotype of XO (a single...
22. [9 PTS] Turner syndrome results when an individual has a genotype of XO (a single X chromosome), and no other sex chromosomes. Color-blindness results from mutation of a single gene on the X chromosome. A couple, both of whom have normal color vision, have a color-blind child with Turner's syndrome. a. Did non-disjunction occur in the mother, or the father, or is it impossible to tell? Explain your answer. (3 pts) (continued next page. b. In the space provided...
Crossing-Over in Meiosis Meiosis is a process of nuclear division that reduces the number of chromosomes...
Crossing-Over in Meiosis Meiosis is a process of nuclear division that reduces the number of chromosomes in new cells to half the number in the original cell. The parent cell is diploid (2n), and it begins meiosis with a replicated set of chromosomes. During meiosis, this parent cell Homologou will divide twice to create four haploid (1n) cells. pairs During prophase I of meiosis I, homologous pairs of chromosomes pair up and stick together to form tetrads through the process...
Question 2: The Atlas blue butterfly has 224 homologous pairs of chromosomes. Each pair consists of one chromosome from the butterfly's mother and one from its father. A. Assuming no crossing over, what is the probability that a sperm this butterfly makes has all of the chromosomes from the butterfly's own father? Why? (You do not need to calculate out this number- a number with an exponent is fine.) (roughly 3-4 sentences) B. How many chromosome 17's does this butterfly...
9. Different genes are located on different kinds of genetic elements - autosomes, W chromosomes, the mitochondrial genome, etc. Different elements are inherited in different ways, so different offspring inherit different elements from different parents. For each case, answer both parents', 'mother', 'father', or 'neither parents. For instance, sons inherit autosomal genes from both parents, but sons inherit W chromosome genes from neither parent (because males are ZZ, and don't have a W chromosome...) (1 point per answer) Daughters inherit...
Question 18 2 pts Homologous chromosomes describe the pairs of chromosomes that diploid organisms, such as humans, possess. Which of the statements about homologous chromosomes is true? Siblings share all the same homologous chromosomes (e.g. One sister has all the same chromosomes as her older sister. O Homologous chromosomes are genetically identical to one another. O People get one of each homologous chromosome from either biological parent. If you examine a pair of homologous chromosomes, they possess different genes.
An antigen found on red blood cells, Xg, is encoded by an
X-linked allele (Xa) that is dominant over an allele for the
absence of the antigen (X–). Scientists studied the inheritance of
these X-linked alleles in children with chromosome abnormalities to
determine where nondisjunction of the sex chromosomes occurred.
Match the genotypes of the parents and offspring to the parent
and cell division stage in which the nondisjunction must have
occurred. Shown as parent × parent = child.
Nondisjunction...
if a father has the defective chromosome and mom has
good chromosome what is the probability he will get the defect
gene?
xY or Yx bad genes
ise) oa child As me th the chid s east e o he eves w be brownThe actunt determinio List the different possible outcomes. Assume that these outcomes re What is the probability that a child of these parents will have the bloe/e genotype What is the probability that the child will have...
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2. Assume chromosome! is clearly larger than chromosome 2. Each chromosome pair contains a maternal and a paternal member (e.g. 1 and 1 & 2 and 2"). An allele called G is localized to 1" whereas an allele called g is on chromosome 1P. Allele R is localized to 2m whereas alleler is localized to 2. Using these designations and clearly drawn and labeled chromosomes,...
Choose the correct answers for the following questions. Also explain the biology behind why answers are scientifically accurate. L.If' a single point mutation occurs at a random place in the genome, what is the most likely outcome? 1. The mutation will have a noticeable negative effect on the organism. 2. Th 3. The mutation will lead to a noticeable gain-of-function in a agene 4. The mutation will have a noticeable positive effect on the organism 5. The mutation will have...
22. [9 PTS] Turner syndrome results when an individual has a genotype of XO (a single X chromosome), and no other sex chromosomes. Color-blindness results from mutation of a single gene on the X chromosome. A couple, both of whom have normal color vision, have a color-blind child with Turner's syndrome. a. Did non-disjunction occur in the mother, or the father, or is it impossible to tell? Explain your answer. (3 pts) (continued next page. b. In the space provided...
Crossing-Over in Meiosis Meiosis is a process of nuclear division that reduces the number of chromosomes in new cells to half the number in the original cell. The parent cell is diploid (2n), and it begins meiosis with a replicated set of chromosomes. During meiosis, this parent cell Homologou will divide twice to create four haploid (1n) cells. pairs During prophase I of meiosis I, homologous pairs of chromosomes pair up and stick together to form tetrads through the process...
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