Question

11. A red and a white snapdragon are crossed, and their offspring is pink. This is an example of

A. Mendel's law of independent assortment.
B. Mendel's law of dominance.
C. incomplete dominance.
D. codominance

12. ( Figure is the first picture: Refer to the figure showing a pedigree of a family affected by a sex-linked recessive disorder. If a female is a carrier for a sex-linked recessive disorder, is it possible for her sons to be unaffected by the disorder? Choose the best answer and explanation.

A. Yes, this is possible. Males receive an X chromosome from their mother. If their mother is a carrier, a male has a 50 percent chance of being affected by the disease and a 50 percent chance of being unaffected.
B. No, this isn't possible. If a mother is a carrier of an X-linked recessive disorder, her sons will be affected by the disease and her daughters will be carriers of the disease.
C. No, this isn't possible. X-linked recessive disorders can't "skip" generations like other genetic disorders.
D. Yes, this is possible. Males receive an X chromosome from their mother. If their mother is a carrier, the mutated X chromosome won't be passed on to sons and so they'll be unaffected.

13. What are the two main phases of the cell cycle?

A. Prophase and anaphase
B. Replication phase and recombination phase
C. Multiplication phase and division phase
D. Interphase and mitosis

14. What were the goals of the Human Genome Project?

A. The goals of the Human Genome Project were to sequence DNA from 50 different species, including humans, and to understand the gene that causes cancer.
B. The goals of the Human Genome Project were to sequence human DNA and to identify all genes present in human DNA.
C. The goals of the Human Genome Project were to sequence human DNA and to understand how it's damaged by exposure to toxins.
D. The goals of the Human Genome Project were to sequence human DNA and to identify the differences between human and chimpanzee DNA.

15. The rearrangement of genetic information so that offspring can inherit new genetic combinations is called

A. recombination.
B. gene editing.
C. replication.
D. gene expression.

16. The central dogma of molecular biology is that DNA is transcribed into mRNA, which is then _______ to protein.

A. transferred
B. translated
C. transduced
D. transformed

17. A three-letter sequence of mRNA that encodes for a specific amino acid is called a/an _______. A series of these links specific amino acids together to form a polypeptide.

A. encryption
B. codon
C. gene
D. DNA

18. Refer to the partially completed Punnett square. Purple flowers (P) are dominant to white flowers (w). What do you predict about the flower color of the offspring resulting from this cross?

A. About 25 percent of the offspring will have white flowers, and about 75 percent of the offspring will have purple flowers.
B. All of the offspring will have purple flowers.
C. About half of the offspring will have purple flowers, and about half of the offspring will have white flowers.
D. About 75 percent of the offspring will have purple flowers, and about 25 percent of the offspring will have white flowers.

19. Cells can interact with other cells

A. that are nearby or within the same tissue.
B. nearby or throughout the body, depending on the type of cell-cell interaction.
C. during specific stages of the cell cycle.
D. that originated from the same stem cells.

20. (SHOWN IN firstPICTURE) Refer to the figure showing a pedigree of a family affected by an X-linked recessive disorder. A female in generation 3 isn't a carrier of the disorder. How can this be?

A. Females receive X chromosomes from their fathers only, which are unaffected in this case.
B. Females don't have X chromosomes so aren't affected by gene disorders passed on the X chromosome.
C. Females receive an X chromosome from each parent. If a mother is a carrier of an X-linked recessive disorder, her daughters have a 50 percent chance of receiving her normal X chromosome and a 50 percent chance of receiving her mutated X chromosome.
D. Females receive an X chromosome from each parent, but in cases of recessive disorders, the mutated chromosome isn't passed on to daughters.

Answer 1

11. D.

12. A.

13. D.

14. B.

15. A.

16. B.

17. B.

18. Refer to the explanation (I highlighted it so you can browse easier)

19. B.

20. C.

Step-by-step explanation:

11. Codominance is a non-mendelian inheritance pattern. It is when two dominant traits are inherited and both are expressed in the organism. Because both are dominant, a blended expression of the trait results in the off-springs.

12. Look at the cross for this problem below:

XHXh and XHY

XH Y

XH XHXH XHY

Xh XHXh XhY

The mother is a carrier, so that means she is heterozygous for the trait hemophilia. Look at the sections with XY. We see that a son can inherit the recessive trait and the other does not.

13. The two main stages of the cell cycle would be interphase and mitosis. Interphase is the phase of the cell-cycle where the cell prepares for cell division. It is at interphase where DNA is duplicated and the cell grows. Mitosis is the actual phase where division takes place.

14. The Human Genome Project or HGP is a collaborative research program that aims to determine the COMPLETE sequence of the human DNA and to identify the locations of the genes in the sections of all chromosomes. It also aims to create maps that link inherited traits across generations.

15. Recombination is a genetic process where DNA is broken down and then recombined to poduce different traits in the off-springs. This can be done between different organisms to produce combined traits.

16. From mRNA, the sequence is translated by the tRNA or transfer RNA. The tRNA carry amino acids that code for specific sequences. These amino acids are the building blocks of proteins.

17. 3-letter sequences in mRNA code for a specific amino acid. These are collectively known as codons. These codons match up with anti-codons of tRNA which code for specific amino acids.

18. For this problem, you did not provide a Punnet but I can help you out by showing you the different possible crosses because the answer would depend on the cross. Look at the attached image.

If your problem is like CROSS 1 then the answer would be 75 percent would be Purple and 25 percent would be white.

If your problem is like CROSS 2 then the answer would be ALL will be purple.

If your problem is like CROSS 3 or CROSS 4, the answer would be half of the offspring will have purple and half would have white.

19. Cells interact with other cells nearby and throughout the body depending on what needs to be done. Cells can interact with nearby cells directly, or they can do this chemically or through other processes as well, especially when they are far apart.

20. Females receive X chromosomes from both parents. Females have a pair of X chromosomes. Going back to your problem, because the trait is recessive and the mother is only a carrier and the father is not a carrier, the chances of a female off-spring inheriting the trait would be 50%. You can look at the cross below:

XHXh and XHY

XH Y

XH XHXH XHY

Xh XHXh XhY

As you can see in the cross, one of the daughters did not receive the recessive trait XHXH.