Which one of the following is not the function of placenta? It
facilitates supply of oxygen and nutrients to embryo
secretes oestrogen
facilitates removal of carbon dioxide and waste material from embryo
secretes oxytocin during parturition
One of the legal methods of birth control is
abortion by taking an appropriate medicine
by abstaining from coitus from day 10-17 of the menstrual cycle
by having coitus at the time of day break
by a premature ejaculation during coitus
Which of the following cannot be detected in a developing foetus by amniocentesis?
Klinefelter's syndrome
Sex of the foetus
Down's syndrome
Jaundice
Artificial insemination means
transfer of sperms of a healthy donor to a test-tube containing ova
artificial introduction of sperms ofa healthy donor into the vagina
introduction of sperms of healthy donor directly into the ovary
Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents?
Incomplete dominance
Law of dominance
Inheritance of one gene
Codominance
D.
Codominance
In codominance, both alleles of a pair express themselves fully in F1 hybrid, so, it resembles both the parents.
In incomplete dominance, the two genes of allelomorphic pair are not related as dominant or recessive, but each of them express itself partially.
Law of dominance states that when a cross is made between two homozygous individuals considering contrasting trait of simple character then the trait appear in F1 hybrids is called dominant inheritance of one gene is based on crossing between single traits.
The incorrect statement with regard to haemophilia is
it is a sex-linked disease
it is a recessive disease
it is a dominant disease
a single protein involved in the clotting of blood is affected
If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
No chance
50%
25%
100%
The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C
A - transcription, B - replication, C - James Watson
A - translation, B - transcription, C - Erevin Chargaff
A - transcription, B - translation, C - Francis Crick
A - translation, B - extension, C - Rosalind Franklin
Which enzyme/s will be produced in a cell in which there is a non-sense mutation in the lac Y gene?
- galactosidase
Lactose permease
Transacetylase
Lactose permease and transacetylase
According to Darwin, the organic evolution is due to
intraspecific competition
interspecific competition
competition within closely related species
reduced feeding efficiency in one species due to the presence of interfering species