LAUNCHPAD F/WHAT IS LIFE
4th Edition
ISBN: 9781319231897
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 8, Problem 9MC
Summary Introduction
Introduction:
Humans have 23 pairs of chromosomes.
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what is the likelihood that a male will inherit a sex-linked mutation on the X chromosome from his father ?
A. 0%
B. 25%
C. 50%
D. 100%
Which statement about homologous chromosomes is FALSE?
Select one:
a. They contain the same genes in the same places along the length of the chromosome
b. One member of the homologous pair came from your mother, the other from your father
c. For a particular gene, one member of the pair may have one allele, while the other has a different allele
d. They are joined together at the centromere as the two halves of the typical X-shaped chromosome
If a diploid cell contains six chromosomes (i.e., three per set), how many possible random arrangements of homologous could occur during metaphase of meiosis I?
a. 24
b. 8
c. 6
d. 23
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- Organism X has the genotype Ccdd. How many different types of gametes can it make and in what proportion? * A. 3 Cd 1 cd B. 1 CD: 1 Cd : 1 cD 1 cd C. 1 Cc : 1 dd D. 1 Cd 1 cd A human female "carrier" who is heterozygous for the recessive, sex-linked trait hemophilia (XHXH), marries a normal male (XHY). What proportion of their male progeny will show the trait? A. 1/4 B. 1/2 C. 0 D. Allarrow_forwardWhy are individuals with an extra chromosome 21, that causes Down syndrome, more numerous than individuals with an extrachromosome 3 or chromosome 16? A.] There are probably more genes on chromosome 21 than on the others B.] Chromosome 21 is a sex chromosome and chromosomes 3 and 16 are not C.] Down syndrome is not more common, just more serious D.] Extra copies of the other chromosomes are probably fatalarrow_forwardhow many chromosomes are present in a human cell during anaphase of mitosis? A. 23 B. 92 C. 22 D. 0 E. 46arrow_forward
- What is it called when chromosomes fail to separate properly during meiosis? A. Nondisjunction B. Karyotype C. Chromosomal separation failure D. Inappropriate separation E. Karyokinesisarrow_forwardIf a muscle cell in a frog has 28 chromosomes how many chromosomes will an unfertilized egg produced by this same frog have? Group of answer choices a. 7 b. 28 c. 35 d. 14 e. 56arrow_forwardYou have a cell with 4 homologous pairs of chromosomes. Assuming no crossing over, how many combinations of chromosomes are possible in cells after meiosis is completed. Group of answer choices A. 4 B. 16 C. 32 D. 8arrow_forward
- If a cell containing 10 chromosomes divides by mitosis, how many daughter cells will be produced? a. 15 b. 2 c. 10 d. 20 e. 5arrow_forwardHow many rounds of cell division are there in meiosis? Group of answer choices A. 1 B. 0 C. 2 D. 4arrow_forwardThe mating below shows the sex chromosome found in two parents and their resulting offspring. Use this family information to answer the following questions. Xfmr1 Y x Xfmr1 XFMR1 → XFMR1 XFMR1Y How many Barr bodies would the child have? a. 3 b. 2 c. 1 d. 0 e. Cannot be determinedarrow_forward
- How many Barr bodies would you expect to find in humans withthe following abnormal compositions of sex chromosomes?A. XXYB. XYYC. XXXD. X0 (a person with just a single X chromosome)arrow_forwardGenes G and H are located on chromosome 18. A woman with the genotype Gg Hh has a child with a man with the genotype GG HH. Unfortunately, the child has the genotype Ggg hhh and only survives for 6 months. When and in which parent did nondisjunction occur? Group of answer choices a. Meiosis II in the mother b. Meiosis I in the mother c. Meiosis I in the father d. Meiosis II in the fatherarrow_forwardThe diploid chromosome number of a cat, Felis catus, is 38.Which of the following rows correctly identifies the number of egg cells and chromosomes in each cell after the process of oogenesis has completed? Select one: a. # of Cells # of Chromosomes 2 38 b. # of Cells # of Chromosomes 3 114 c. # of Cells # of Chromosomes 4 19 d. # of Cells # of Chromosomes 1 19arrow_forward
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