If an Xx female and XY male have children, what fraction of their offspring will have an affected chromosome, and what fraction is likely to be affected by hemophilia?
1. Uracil pairs with
Answer - Adenine
2. The amino acid serine is coded by the mRNA codon AGU. What is the base sequence of the DNA gene that originally produced this mRNA codon?
Answer - TCA
3. If an Xx female and XY male have children, what fraction of their offspring will have an affected chromosome, and what fraction is likely to be affected by hemophilia?
Answer - 1/2 and 1/4
4. Select the statement that is true.
Answer - DNA has the sugar deoxyribose, while RNA has the sugar ribose.
5. What role does tRNA play in the translation process?
Answer - tRNA carries amino acids to the ribosome and helps form proteins.
I'm in Honors Biology and these are the answers for the quiz 100%
Also, just a heads up, never trust the letter answers for these types of quizzes. The letters are different for everyone.
can confirm these are the correct answers to the honors bio ^
Yes I can. Those are the correct ones. I'm in Honors Bio and I submitted that as soon as I was done.
To determine the fractions of offspring with an affected chromosome and likely to be affected by hemophilia, we need to understand how these conditions are inherited.
In humans, sex chromosomes determine the sex of an individual. Females have two X chromosomes (XX), and males have one X and one Y chromosome (XY). Hemophilia is a genetic disorder linked to the X chromosome.
Since the X chromosome is passed directly from parents to children, the inheritance of hemophilia can vary depending on whether it is carried by the mother (Xx) or father (XY).
To calculate the fractions, let's consider the possibilities:
Mother (Xx) x Father (XY):
- The mother can pass on either her X or her x chromosome to her children.
- The father will pass on either his X or his Y chromosome to his children.
Possible combinations of the X and Y chromosomes:
1. Mother's X + Father's X = XX (female)
- This female offspring will not have the affected X chromosome (hemophilia).
2. Mother's X + Father's Y = XY (male)
- This male offspring will inherit the affected X chromosome from the mother, resulting in hemophilia.
3. Mother's x + Father's X = xX (female)
- This female offspring will inherit the affected X chromosome from the mother, resulting in hemophilia carrier status. In most cases, carriers do not exhibit symptoms but can pass on the condition to future generations.
4. Mother's x + Father's Y = xY (male)
- This male offspring will not have the affected X chromosome (hemophilia).
Considering these possibilities, we can determine the fractions of offspring:
- Fraction of offspring with an affected chromosome: 2 out of 4 possible combinations have an affected X chromosome (XX and xX).
Therefore, 2/4 or 1/2 (50%) of their offspring will have an affected chromosome.
- Fraction of offspring likely to be affected by hemophilia: 1 out of 4 possible combinations will be affected (XY).
Therefore, 1/4 or 25% of their offspring is likely to be affected by hemophilia.
Please note that these percentages represent statistical probabilities, as the inheritance of traits involves various factors and exceptions.