If one parent is carrier and one parent is a sufferer of sickle-cell anaemia, then the progenies will be
- A50% normal and 50% carrier
- Ball sufferers
- ✓50% carrier and 50% sufferer
- Dall carrier
Answer: C.
View full solution →100 questions across 12 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
Write the Correct Alternative.
21 Q→02Find the odd one out.
7 Q→03Write the following Statement Is True Or False. & Write True Statement.
17 Q→04Answer the following in one sentece.
9 Q→05Answer the following questions in detail.
8 Q→06Distinguish Between.
2 Q→07Answer the following question.
5 Q→08Give Scientific Reason.
5 Q→09Answer the following question.
13 Q→10Fill In The Blanks.
7 Q→11Match The Columns/pair.
4 Q→12Draw Diagram.
2 Q→One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Answer: C.
View full solution →Answer: B.
View full solution →Answer: A.
View full solution →Answer: D.
View full solution →Answer: C.
View full solution →Homologous chromosomes
| Column ‘A’ | Column ‘B’ |
| (1) Tay-Sachs disease | (a) Multifactorial disorder |
| (2) Diabetes | (b) Destruction of erythrocytes |
| (3) Sickle-cell anaemia | (c) Absence of melanin |
| (4) Albinism | (d) Monogenic disorder |
| Column ‘A’ | Column ‘B’ |
| (1) Yellow and rinkled | (a) yyrr |
| (2) Green and round | (b) YyRr |
| (3) Yellow and round | (c) YYrr |
| (4) Green and wrinkled | (d) yyRr |
| Column 1 | Column 2 | Column 3 |
| (1) Leber hereditary optic neuropathy | (a) 44 + XXY | (i) Pale skin, white hairs. |
| (2) Diabetes | (b) 45 + X | (ii) Men are sterile. |
| (3) Albinism | (c) Mitochondrial disorder | (iii) Women are sterile. |
| (4) Turner syndrome | (d) Polygenic disorder | (iv) This disorder arises during development of zygote. |
| (5) Klinefelter Syndrome | (e) Monogenic disorder | (v) Effect on blood- glucose level. |
a. Hereditary characters are transferred from parents to offsprings by …………………………….., hence they are said to be structural and functional units of heredity.
b. Organisms produced by …………………………….. show minor variations.
c. The component which is in the nuclei of cells and carries the hereditary characteristics is called ……………………………..
d. Chromosomes are mainly made up of ……………………………..
e. Organisms produced through …………………………….. show major variations.
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