#Question id: 5351
#Unit 8. Inheritance Biology
Consider the accompanying pedigree of a rare autosomal recessive disease, PKU. (Assume individual coming from outside that is homozygous for normal allele) What is the probability of child showing trait of A and B individuals?
#Question id: 5352
#Unit 8. Inheritance Biology
Marriage occurs between individuals III-3 and III-6, what is the probability couple; son would be affected with the trait?
#Question id: 5353
#Unit 8. Inheritance Biology
Which of following is not a mode of inheritance, but female parents (I-1) carry only normal allele?
A. X link recessive b. Autosomal recessive
c. Autosomal dominant d. X- link dominant
#Question id: 5354
#Unit 8. Inheritance Biology
Eye color gene link with X chromosome, If red eye color gene is dominant over white eye color gene. Which of the following genetic cross and their respective offspring is not correlated?
|
Genetic cross |
Phenotype of offspring |
|
|
1 |
Heterozygous Red eye female X Red eye Male |
All male red eye |
|
2 |
Heterozygous Red eye female X white eye Male |
Male either red or white eye |
|
3 |
Homozygous Red eye female X white eye Male |
All female red eye |
|
4 |
Homozygous Red eye female X Red eye Male |
All male red eye |
#Question id: 5355
#Unit 8. Inheritance Biology
The characteristics of X-linked inheritance as following statement are correct
A- Reciprocal crosses resulting in different phenotypic ratios in their offspring
B- Heterozygous females transmit each X-linked allele to approximately half their daughters and half their sons
C- Males that inherit an X-linked recessive allele always exhibit the recessive trait
D-Females that inherit an X-linked recessive allele from male always exhibit the dominant trait
E- Males do not transmit each X-linked allele to their sons
#Question id: 5356
#Unit 8. Inheritance Biology
In the following pedigree, individuals with shaded circle or shaded square show presence of a recessive autosomal trait. The calculated risk of occurrence of this trait for III-I is