Genetics Answers

The goat's skin cell contains 60 chromosomes. How many chromosomes does a goat's sperm cell have?

With regard to the HLA-A and HLA-B antigens complete the genotypes, haplotypes and decide if the marked man can be the biological father of the child:


Phenotype of mother:HLA-A2,32; B13,35 : What genotypes and haplotypes does she

have?


Phenotype of child: HLA-A1,32; B8,35 :What genotypes and haplotypes does the child

have?


Phenotype of marked man: HLA-A2; B7,13 :What genotypes and haplotypes does he have?

Can he be the biological father of the child?

A mother with blue eyes (bb) and a father with brown eyes (Bb) want to have children. what are the

Genotypes

Phenotypes

percentages?

A mother with blue eyes (bb) and a father with brown eyes (Bb) want to have children.

Mother: ________ x Father: _________

Genotypes Phenotypes %

Assume a male with type O blood mates with a female who has type A blood. The female's mother had type A blood and her father had type B. What is the probability that their first child will have type A blood? What is the probability that their third child will have type O blood?

A man of the blood group O (genotype OO) married a woman of the blood group B (genotype BB). They have twins of the blood group O. Determine the possible genotypes of each member of the family with regard to the ABO blood types and locus H and explain this situation.


Can you help me with this please? I don't know how to even start

In humans there is a disease called Phenylketonuria (PKU) which is caused by a recessive allele. People with this allele have a defective enzyme and cannot break down the amino acid phenylalanine. This disease can result in mental disability or death. Let "E" represent the normal enzyme. Also in humans is a condition called galactose intolerance or galactosemia, which is also caused by a recessive allele. Let "G" represent the normal allele for galactose digestion. In both diseases, normal dominates over recessive. If two adults were heterozygous for both traits (EeGg), what are the chances of having a child that is completely normal? Has just PKU? Has just galactosemia? Has both diseases?

Explain the principal of recombinant DNA technology and list applications of genetic engineering technique.

How would differences in gene methylation cause a difference in phenotype between two people with identical genes?

Differentiate between monozygotic and dizygotic twins. What is the use of twin studied? State Hellin's Law and discuss it's applications in twin studied.