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Consider the two surgical procedures (A and B) given below and choose the correct statement:
In 'test-tube baby' procedure:
What ratio is expected in offsprings if father is colour blind and mother's father was colour blind:
Match List-I with List-II: List-I A. Two or more alternative forms of a gene B. Cross of F1 progeny with homozygous recessive parent C. Cross of F1 progeny with any of the parents D. Number of chromosome sets in plant List-II I. Back Cross II. Ploidy III. Allele IV. Test cross
Sickle cell anaemia is due to:
Experimental verification of the chromosomal theory of inheritance was done by:
Genes R and Y follow independent assortment. If RRYY produce round yellow seed and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?
Select the correct statement/s with respect to mechanism of sex determination in Grasshopper. A: It is an example of female heterogamety B: Male produces two different types of gametes either with or without X chromosomes. C: Total number of chromosomes (autosomes and sex chromosomes) is same in both males and females. D: All eggs bear an additional X chromosome besides the autosomes. Choose the correct answer from the options given below:
Among fraternal twins, one baby is haemophilic while the baby's brother is normal. Which statement is true?
The phenomenon where a single gene exhibits multiple phenotypic expressions is called:
Which of the following occurs due to the presence of autosome linked dominant trait?
Which of the following is the example of a sex-linked disease:
In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, what percentage of the offspring will be tall with red fruit?
Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement:
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?
When a tall pea plant with round seeds was selfed, it produced the progeny of tall plants with round seeds and some dwarf plants with wrinkled seeds. The genotype of the parent is:
In his classic experiments on pea plants Mendel did not use?
As per ABO blood grouping system, the blood group of father is B+, mother is A+ and child is O+. Their respective genotype can be
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): A father will never pass the gene for haemophilia to his sons. Reason (R): Haemophilia is sex-linked (X-linked recessive trait). In the light of the above statements, choose the correct answer from the options given below:
Several hormones like hCG, hPL, oestrogen, progesterone are produced by: