A recessive trait is expressed only by an individual who is (A) haploid. (B) pol

Question

A recessive trait is expressed only by an individual who is (A) haploid. (B) polygenic. (C) heterozygous. (D) homozygous. A tall pea plant (TT) and a tall pea plant (T) have (A) the same alleles. (B) the same filial type. (C) the same genotype.(D) the same phenotype 18. The failure of homologous chromosomes to separate properly during meiosis is called Watson and Crick's model of DNA replication is called Pea plants usually reproduce by 19. (A) telomere failure. (B) disjunction. (C) nondisjunction. (D) zygote failure. 20. (A) transcription. (B) semiconservative. (C) conservative. (D) translation. 21. (A) test-crossing. (B) cross-pollination. (C) cloning. (D) self-pollination. 22. The pairs of alleles in an organism's genetic makeup are called its (A) genotype. (B) phenotype. (C) filial type. (D) parental type. 23. The concept that a random distribution of alleles occurs during gamete formation is the (A) concept of probability. (C) law of segregation. (B) concept of dominance. (D) law of independent assortment. continue

Explanation / Answer

19. C

Non disjunction produces cells or gametes with extra or missing chromosomes.

20. B

In semiconservative replication the daughter cells have one parental DNA strand and one new DNA strand.

21. D

Pea plants are characterized by predominant self fertilization.

22. A

Genotype is defined as the genetic constitution of an individual for any particular trait and is expressed by a symbol containing pair of alleles e.g TT,Tt, tt etc

23. D

This law states that assortment of genes of one pair is independent of the other pair at the time of gametogenesis.

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